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Water Purification

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Water Purification

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✧Physics? Biology? Chemistry? Astronomy?

✧Name of the experiment

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FIND THE DIFFERENCE BETWEEN WHEN MAGNET IS IN COLD PLACE AND HOT PLACE!

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REFRIGERATOR

HOT PLACE

2 HORSESHOE MAGNET

5 SMALL MAGNETIC OBJECTS

COAT

HOT PACK

NOTEBOOK

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DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. Dr. Flossie Wong-Staal , a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. , a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

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DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. Dr. Flossie Wong-Staal, a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

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How much lights should a star get so that it will be able to be seen by human eye?

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Air Currents

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1. 3 Bowls

2. 1 raw potato

3. Water

4. 1 tablespoon of salt

5. Knife

6. 1 tablespoon of sugar

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I predict that I won't be able to see smaller stars and few medium stars because they will get less light than bigger ones.☆

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WHAT IS THE IMPACT OF TEMPERATURE ON MAGNET'S STRENGTH?

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Chemistry

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two plastic cup

index card

hot and cold running water

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1. 1 plain sheet of white paper

2. 1 drop of cooking oil

3. meterstick

4. a 200-watt light bulb and lamp that can be used with such a light bulb

5. outdoor area with an electrical outlet

6. pencil ✎ 1 sheet lined paper

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DNA of different fruits and vegetables

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fruits

plastic bag

Dish degent

water

2 plastic cups

Coffe filter

Rubbing alchol

Coffee stirrer

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Fruits: Orange, Strawberry, Mango, Cucumber, Cabbage, Mushroom

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What is the impact of different natural materials on water purification?

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I hypothesize that natural materials that help water purification the best will be the ones that trap contaminants.

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1. A rope

2. Lego blocks

3. A ring

4. A timer

5. Tape

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Dirty Water

Cotton

Paper Towel

Potting Soil

Sand

Any other natural materials you want to test

2 Transparent Cups (One with holes on the bottom)

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1 seal plastic bag

2 strawberries

2 teaspoons of detergent

1/2 cup of water

2 plastic cups

1 coffee filter

1/2 cold rubbing alcohol

1 coffee stirrer

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How does different types of liquid affect a osmosis?

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How does diffrent fruit(not strawberry) impact the extraction of DNA?

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How does weight affects the time?

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My kids went zip lining for the first time in France last summer, and they absolutely loved it. I was having mini heart attacks watching my 3 and 5 years old flying through the air, but they had a blast.

So when I mentioned that we are going to try and build a LEGO zip line, they were on it!

What is awesome about the LEGO zip line activity is that there is no one way to design the zip line "cage, or the structure that holds your LEGO minifigure. After playing with the zip line for an hour and a half, I lost track of how many designs we created.

How to Make the LEGO Zip Line

This post contains affiliate links. Please see my full disclosure policy for details.

Materials:

Directions:

1. Build your cage - this should be a structure that can hold the LEGO minifigure with a hole on the top where the zip line will go through.

2. Put the LEGO minifigure in the cage.

3. Tie one end of the string to a doorknob, back of a chair, or any place that is stationary and higher up.

4. Thread the string through the hole.

5. Pull the string so that it's taut and hold the loose end tightly and on a decline.

6. Push the cage all the way to the highest point of the string.

7. Let go of the cage watch it slide down the zip line!

Science Behind the LEGO Zip Line

While the LEGO zip line may seem like just a simple, fun activity, there are so many science concepts that you can teach your kid. As your child experiment with different designs, talk about:

Gravity: Why do the minifigure and the cage go downward on the zip line instead of sliding upward? Gravity is the force that pulls objects toward the center of the Earth. In this case, gravity is pulling the LEGO pieces to the ground.

Friction: Why do some cages slide down smoother than others? Friction occurs when one object rubs against another. Friction works against and acts in the opposite direction of motion.

Slope: How can you make the same cage design slide down the zip line faster or slower? The slope describes how steep a straight line is, and you can change the slope of the zip line by moving the end of the string that's touching the ground.

Speed: How fast does the cage move down the zip line? Speed is the measure of how fast something is moving or the distance that an object moves in a certain amount of time.

Weight: Do heavier cages slide down the zip line faster? Weight is the force gravity applies to an object and has an impact on speed.

We love this simple LEGO activity because we can experiment with so many variables.

Here are some of the things we tried:

Make the zip line steeper. Did the cage go faster or slower?

Do the opposite and make the zip line longer and hold it at a gradual slope. Did the cage go faster or slower?

Add on a few more LEGO blocks to the bottom of the cage to make it heavier. How did the increased weight affect the speed at which the cage slid down the zip line?

Design a cage that is very wide. How did that affect the cage when it traveled down the zip line?

Use a round piece of LEGO instead of a flat piece for the hole. Did the cage slide down smoother?

Change the tension by making the string more or less taut. How does that affect the cage?

YOU MAY ALSO LIKE: Balloon-Powered LEGO Car
One thing we didn't get to try is using a wheel on the string. We just didn't have one big enough. If you do, I suggest making a pulley and try to see if the wheel makes your LEGO guy go faster down the zip line.

Before each experiment, ask your child what he or she thinks is going to happen. For example, after you make the slope steeper, ask your child if he or she thinks the LEGO cage is going to go faster or slower. This is so great for their critical thinking!

Final Thoughts on the LEGO Zip Line Activity

Building a zip line with LEGO bricks is one STEM activity your kids will love. We learned so much through this activity and my son built so many different cage designs. I really hope you try it out!

What's wonderful is that even though my 3 years old was too young to build a good cage, she was able to participate by holding the zip line or sliding the cage down the string.

STEM fun for the whole family!
YOU MAY ALSO LIKE: Penny LEGO Boat Challenge
Want this activity in an easy-to-print file? I have compiled 5 super fun LEGO STEM activities for kids in a printable PDF.

Each activity includes a list of supplies, step-by-step directions, an explanation of the science behind the activity, and different extensions based on the science concepts.

It includes:

Balloon-Powered LEGO Cars

LEGO Zip Line

Penny LEGO Boat Challenge

LEGO Volcano

LEGO Plinko Board

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LEGO Zip Line Activity: A Fun STEM Challenge for Kids

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My kids went zip lining for the first time in France last summer, and they absolutely loved it. I was having mini heart attacks watching my 3 and 5 years old flying through the air, but they had a blast. So when I mentioned that we are going to try and build a LEGO zip line, they were on it!

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what is the impact of temperature on how water mixes.

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Chemistry - Bouyancy                                                                                                          

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Chemistry - Bouyancy                                                                                                          

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DNA

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DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. Dr. Flossie Wong-Staal , a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. , a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

# data[].attributes.attachment_link.description
DNA is the genetic blueprint for a cell. It is necessary for life and the instructions in DNA control everything a cell does. Dr. Flossie Wong-Staal, a virologist, was the first person to unravel the genetic blueprint of a deadly virus called HIV, and discovered ways to prevent the virus from spreading.

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Why does a heavy boat float while a small rock sinks? Would a buoy sink if an elephant sat on it? Sometimes objects sink because they're heavy, but other times it's because they are buoyant! This buoyancy for kids experiment helps explain why.

Read About Buoyancy First

One way to get your child interested and excited to explore buoyancy is to read a picture book about it. Scroll down to the end of this article for two book recommendations.

Get Started

The set up is simple. Start with a tall clear vase of water and a small collection of citrus, such as Wonderful Halos mandarins . They are a great snack time treat, and can be included in creative science projects to teach kids that healthy snacking is fun. Not to mention, Wonderful Halos are sweet, seedless and easy to peel, perfect for kids and adults!

With these supplies in hand, ask your child what he or she thinks will happen if they drop a mandarin in the water. Will it sink or float?

If you have a preschooler, you could also offer a small collection of objects such as rocks, seashells, or twigs and ask what they think will happen if dropped in the water.

Have paper and pencil ready in case you want to take notes.

More to Explore

A little while back we set up a floating egg experiment to explore buoyancy from a different angle. Once you're done exploring the buoyancy experiment on this page, check out the floating egg experiment. All you will need are an egg, water, and a few cups of salt.

Back to buoyancy and citrus, here's what you'll need...
This article may contain affiliate links
Objective

To learn about density while making and testing predictions about sinking and floating.

Supplies

Wonderful Halos

Tall Glass Jar

Water

Other objects to test for buoyancy

Paper and Pencil for Note-taking (optional)

Steps

1. Predict if the mandarin will sink or float

2. Drop it in the water. What happens?

3. Predict if the peeled mandarin will sink or float.

4. Drop it in the water. What happens?

5. Describe how the whole mandarin and peeled mandarin are different.

6. Discuss theories about the phenomena that was witnessed.

Step 1: Select your fruit and drop it in the water.

Ask: What happens when you drop the mandarin in the water?

It floats! What? Why doesn't it sink?

Ask: Why do you think it floats?

Step 2: Peel the fruit and drop it in the water. What happens?

It sinks! Why does this happen?

Ask: Why do you think the peeled mandarin sinks?

Next: Experiment with other fruits and objects. We tried a lemon: both unpeeled and peeled.

What we noticed

The lemon with a peel floated and peeled lemon sank, the same as our first test with the mandarins: with a peel floats and without sinks.

You may notice that some of the peeled mandarins actually float. What's going on here? Why do some sink and some float? This is good question, and we'll tackle it in just a moment.

Hypothesis

After going through this process, I asked my daughter to make some guesses about what was happening. Here are her thoughts:

1. The peel has air in it, which helps it float.

2. When it's peeled, there are gaps between the mandarin sections so water can get into it, making it sink.

3. When it has a peel it's like a buoy.

4. A rock is heavier so it sinks and the peeled orange is heavier because the water fills it.

The Science Behind the Experiment

Imagine trying to push a beach ball into a pool of water. What happens? You will feel resistance from the water, won't you? This upward force pushes from the water toward the ball. Now, if you drop an object such as a rock into water and it sinks, gravity is at play. In this case, the downward force of gravity is greater than the upward force of the water. If the upward force of the water is greater than the downward force of the object, the object will float.

Now, imagine that you jump into a pool while wearing a life jacket. What happens? Without the life jacket, your body might sink to the bottom, but with the life jacket it floats. The life jacket is filled with a light material that has lots of little air pockets. The pockets of air weigh less than the water it displaces, so the jacket (and you!) will float. Similarly, if you've ever tried floating on your back (without a life jacket), taking a big breath of air can help keep you buoyant because you're adding air to your body.

The Mandarin Peel is Like a Life Jacket

The whole mandarin is like a person wearing a life jacket. The peel of the mandarin is filled with small air pockets that help the mandarin float, like a life jacket. Remove the peel and the cracks between the mandarin segments fill with water, making it more dense, making it sink.

So why do some of the peeled mandarins sink while others float? We have a few theories.

1. Mandarins with dense segments will sink.

2. Mandarins that have air in the segments will float.

3. Sometimes water will get between the segments, adding more weight, making the mandarin sink.

4. When the pith, or white part of the mandarin, isn't fully removed, it can act as a barrier to water entering between the segments. This keeps the mandarin floating.

What happens when you change the density of the water by adding salt, baking soda, or sugar to it? Try the simple activity in this post to find out.

Recommended Books about Buoyancy

Who Sank the Boat?, Pamela Allen

Things That Float and Things That Don't, David Adler
Thank you Wonderful Halos for sponsoring this post. All opinions are my own.

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Buoyancy for Kids: Will it Sink or Float? | TinkerLab

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Why does a heavy boat float while a small rock sinks? Would a buoy sink if an elephant sat on it? Sometimes objects sink because they're heavy, but other times it's because they are buoyant! This buoyancy for kids experiment helps explain why.

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My hypothesis is that the potato that was inside salt water would be salty because of osmosis and the salt in the water would want to be equal with the plain potato. Also, I think the potato that was inside the sugar water would be sugary because of the same reason.

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Do fruits and vegetables have a different result of extraction of DNA?

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1. Cut the potato lengthwise until you have a few pieces that have 3 flat sides

2. Fill all bowls with water.

3. Add the salt to one of the bowls and sugar to the other.

4. Place three of the potato pieces in the water-only bowl and put it in the sugar water.

5. Put the last potato piece to the salt water.

6. Allow the potatoes to soak for 20 minutes.

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What is the impact of the materials on DNA?

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What is the impact of the materials on DNA?

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MY HYPOTHESIS IS THAT MAGNET'S STRENGTH WILL BE SAME REGARDLESS OF THE TEMPERATURE OF THE LOCATION.

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How is other fruits DNA different from the strawberries?

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picture⬆️

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My hypothesis is that diffrent fruits DNA will have diffrent looks.(color...)

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I predict that the DNA of each fruit would be different because the DNA's structure is different which makes the other fruits and the strawberry different

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What is an impact of peel on the tangerine?

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Chemistry-DEMONSTRATING OSMOSIS WITH A POTATO

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Chemistry-DEMONSTRATING OSMOSIS WITH A POTATO

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1. Place a small drop of oil in the center of the paper and smudge it with your finger into a circle 2 centimeter (cm) in diameter.

☆

2. Outdoors, plug in the lamp with the 200-watt bulb.

☆

3. Hold the sheet of paper between the Sun and the lamp.

☆

4. To find the point at which both the light of the lamp and the sunlight are equally bright, move the sheet closer and farther from the lamp until the oil spot is as bright as the rest of the paper.

☆

5. Using the meter stick, measure the distance between the lightbulb and the paper.

☆

6. Carefully examine the picture of a starry sky.

☆

7. Count the number of stars you see in the picture. Record it.

☆

8. Find stars that we couldn't see.

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Does the skin in fruit affect the buoyancy?

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How does different powder effect the potato?

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I hypothesis that, the fruit will have a bigger extraction than the vegetable.

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1. TAKE THE HORSESHOE MAGNET, AND 5 SMALL MAGNETIC OBJECT.

2. PUT THE HORSESHOE MAGNET TO REFRIGERATOR, AND LEFT THEM FOR 10 MINUTES.

3. AND SEE MAGNET CAN HOLD HOW MANY MAGNETIC OBJECTS.

4. TAKE THE COAT FROM MY CUBBY.

5. PUT ANOTHER MAGNET IN MY COAT(THAT HAS HOT PACK), AND LEAVE THEM OUTDOOR FOR 10 MINUTES.

6. AND ALSO SEE HORSESHOE MAGNET CAN HOLD HOW MANY MAGNETIC OBJECTS.

7. NOTE THEM.

8. FIND THE DIFFERENCE BETWEEN COLD ONE AND HOT ONE.

9. SEE WHAT ONE IS STRONGER!

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I predict that when I pull the card out than the water will mix together.🤨

I think the temperature is doesn't matter.🧐

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1. One raw potato

2. Knife

3. Salt

4. Four Bowls

5. Soap Powder

6. Water

7. Sugar

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I predict that the skin in the material affects the buoyancy because the skin one is water proof so that it will go lower than the peeled one

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re-sealable plastic bag

Strawberries, orange, mango (fresh or frozen)

2 tsp Dish detergent

1/2 cup Water

2 Plastic cups

1 Coffee filter

1/2 COLD Rubbing Alcohol

1 Coffee Stirrer

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I hypothesis that both of them will sink. Because they have similar weight.

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Paper with this photo printed will be used

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How do different materials effect the process of water purification?

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1. A glass filled with water

2. 1 grape of peeled one

3. 1 grape of non-peeled one

4. 1 banana of peeled one

5. 1 banana of non-peeled one

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I predict that the potato in the salt water will become salty because of the osmosis. I think the other thing will become the same like the soap powder potato will have good smell.

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1. 1 peeled tangerine

2. 1 Just tangerine

3. Big glass jar

4. Banana

5. water

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1. Grab one of the peeled grape and non-peeled grape.

2. Put them inside the water in once.

3. Wait for 3 minutes(For the grape to go their place).

4. Compare between the peeled grape and non-peeled grape.

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1. Slice the potato lengthwise with 2 flat sides

2. Fill all bowls with water

3. Add salt for one ball, sugar for another and soap powder for the other.

4. Put 2 sliced potatoes for each bowl

5. Let the potatoes soak for 20 minutes

6. See what happened to the osmosis

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1. Take off the stem

2. Seal the fruit in a zip-lock bag

3. Crush the strawberries

4. mix together 2 teaspoons of detergent, 1 teaspoon of salt and 1/2 cup of water. (DNA extraction liquid)

5. Add two teaspoons of your DNA extraction liquid to the bag of strawberries

6. Reseal the bag

7. gently smash for another minute (avoid making too many soap bubbles).

8. Place the coffee filter inside the other plastic cup.

9. Open the bag and pour the strawberry liquid into the filter.

10. twist the filter just above the liquid

11. gently squeeze the remaining liquid into the cup.

12. pour down the side of the cup an equal amount of cold rubbing alcohol as there is strawberry liquid. Do not mix or stir.

13. isolated the DNA from the rest of the material contained in the cells of the strawberry.

14. Tilt the cup and pick up the DNA using a plastic coffee stirrer or wooden stick.

15. follow again with the vegetable

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1. Water

2. Cotton

3. Potting soil

4. sand

5. rocks

6. wood / sticks

7. 2 transparent cups ( one with holes on the bottom )

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1. Pour the water in the jar.

2. Drop JUST one fine tangerine in the water.

3. Write about what happened to tangerine.

4. Drop peeled tangerine into the water.

5. Write about what happened to peeled tangerine.

6. Try other fruits by same way.

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Salt Water

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How does a different amount of salt affect the temperature of water when it meets ice?

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1,Put the first fruit in the ziplock bag.

2,Then smash the fruit for 2 minutes.

3,In the plastic cup, (making a dna extraction liquid) mix 2 teaspoon of detergent, 1 teaspoon of salt, 1/2 spoon of water.

4,Add 2 teaspoon of DNA liquid in to the ziplock bag.

5,Smash the bag for another 1 minutes.

6,Place the coffee filiter in the another plastic cup.

7,open the bag and pour the strawberry liquid.

8,Next, pour down the side of the cup an equal amount of cold rubbing alcohol as there is strawberry liquid.

9,Within a few seconds, watch for the development of a white cloudy substance (DNA) in the top layer above the strawberry extract layer.

10,Tilt the cup and pick up the DNA using a plastic coffee stirrer or wooden stick.

11,follow the same step all over with 2 fruit.

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I predict that adding more salt to ice will decrease the water's temperature. This is because the salt absorbs all the heat from the

ice.

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﻿1 test tube

﻿1 straight drinking straw

﻿½ cup crushed ice

﻿1 thermometer

﻿2 teaspoons of salt

﻿1 plastic cup

¼ cup water

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1. Pour the water into the plastic cup.

2. Place the straw in the water.

3. Hold finger tightly on the opposite end of the straw, the side NOT in the water.

4. Lift the straw out of the water.

5. Place the straw inside the test tube and release your finger from the top.

6. Empty the cup of water and refill the cup with crushed ice.

7. Place the test tube into the cup of crushed ice.

8. Add 1 spoonful of salt to the crushed ice.

9. Put the thermometer into the cup of crushed ice.

10. Wait about 5 minutes.

11. Record the temperature.

12. Add 1 spoon more salt to the crushed ice.

13. Wait about 5 minutes.

14. Record the temperature.

15. Repeat several times.

16. Check the results.

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I think the Orange's DNA will be bigger than the strawberry's DNA.

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I hypothesis that materials that only let water through is going to purify the water the best.

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Before you do the experiment, read through the steps below.

1. get two glass jars and get the hot and cold running water and pour to the hot water to the first jar and second jar pour the cold water.

2. now put the card in the top of the cold water and now filp than and out the card and see what happen

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I hypothesis if the thing is heavy will come to the other side faster than the light thing.

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1. make holes in one cup

2. put cotton on the bottom of the cup with the hole.

3. Prepare mixture with soil and 3 cups of water.

4. Position pot over empty glass jar, then Position pour 1 cup of dirty water pour over sand in pot.

5. Let water Let drain through sand and cotton filter into glass jar.

6. Observe any differences between water and the filtered water.

7. repeat with other materials

8. dispose all of the natural materials.

9. Clean up any spills with paper towels.

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1. Put the ring in the rope.

2. Fix the rope where you want.(But you have to fix it High to low)

3. Connect the ring with one lego block.

4. Grab the timer and start it when the ring start to fall.

5. See how much time does it take the ring to get to the other side.

6. Connect more lego blocks to the ring and do it again.

7. See what goes the fastest.

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Osmosis

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1 test tube 1 drinking straw, straight not flexible 1⁄2 cup crushed ice 1 thermometer 2 teaspoons of salt 1 plastic cup 1⁄4 cup water

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Pour the water into the plastic cup. 2. Place the straw in the water. 3. Hold you finger tightly on the opposite end of the straw, the side NOT in the water (Figure 1). Lift the straw out of the water. Figure 1 4. Place the straw inside the test tube and release your finger from the top. This should allow the water held inside the straw to drip into the test tube (Figure 2).Empty the cup of water, and refill the cup with crushed ice. 6. Place the test tube into the cup of crushed ice. 7. Also put the thermometer into the cup of crushed ice (Figure 3). Figure 3 8. Wait about 5 minutes. Record the temperature. 9. Add the salt to the crushed ice. 10. Wait 5 minutes. 11. Record the temperature. 12. Record your observations regarding whether or not the drops of water froze.

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What was the temperature you recorded the first time? What about after you added the salt?

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LEGO bricks

LEGO minifigure

piece of thick string

timer

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I hypothesis that temperacher is down when i put rthe salt

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How does salt water impact osmosis?

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1. Place the cotton on the bottom of the cup with holes.

2. Put potting soil on top of the cotton.

3. Position the other cup (cup without holes) under the cup with holes.

4. Pour the dirty water on the sand and let it drain down to the bottom cup.

5. Observe and record what happened. Did the water get cleaner?

6. Repeat steps 1-5 with different natural materials and try some combinations. Ex) Rock + Cotton + Sand, etc...

7. Dispose of natural materials and water outdoors when you are finished.

8. Clean up any mess you made with paper towels.

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I predict salt water will cause the potato to reduce in size as the salt will attract water and suck out water of the potato, and a sizable portion of the potato is made out of water.