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Acids and bases

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What acids and bases makes neutral liquid

(e.x. vinegar and baking soda)

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I think the acids and bases' amount matter

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baking soda

lemon juice

orange juice

Egg whites

Soap water

Vinegar

(etc..)

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1. get some acids and bases

2. Pour one acid in one cup

3. pour base one in one cup

4. Mix them together

5. Repeat with other acids and bases

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I hypothesis that the my balloon is small but if i put more yeast, sugar and water the balloon is will be bigger.

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I hypothsised that sand will be the best purifyer and my hypothesis was correct. Because sand had a purifying cycle underground, sand is a really good purifying material. Next time, I will combine every material and see what happens to the water.

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The reason how dirty water gets purified by natural materials is because the dirt gets stuck in the density of the resource. Sand has many little particles that make the sand denser and denser. This helps the dirt to get stuck in the sand and only smooth water can go through. So, the most dense sand purified dirty water the best. Also, flower petals purifyed the water well too because it has a large face and could catch dirt well.

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SAND: Sand quite a long time for the water to fall. The water was kind of brown however, there were no dirt falling with the water. I could see that the sand was absorbing a little water as well.

ROCKS: Rock water was pretty yellow. A lot of dirt got washed away but the water did not become clean like the others. However, the water came out quickly and we did no have to wait that long.

Time: 3min

LEAVES: The leaves didn't purify water well. There were a lot of dirt coming out and it had really yellow water. Almost similar with the dirty water. I think it is because we ripped the leaves and it became not dense.

Time: 4min

TREE BARK: When I poured the water, some parts of the tree bark floated up. I wondered why the tree bark floated but not the leaves that were lighter than the bark. The water looked orange

Time: 3min 35sec

FLOWER PETAL: I thought that flower petals won't be a good purifyer because it looked similar to leaves and leaves did not work well. However, the flower petals turned out to be better than the leaves but not as good as sand. The water seemed yellow. ( there were a little but of dirt there)

Time: 3min 49sec

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It make bubble but it didn't make balloon big.

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Question

How much will the balloon get big?

Hypothesis

"I hypothesis that the balloon will pop.

Meterials

3 pack of yeast

2 cup of suger

1 cup of warm water

1 bottle

1 measuring cup

1 balloon

Procedure

1. In the mixing bowl, combine the sugar and dry yeast.

2. Measure 1 cup of warm water using the measuring cup.

3. Add the yeast/sugar mixture to the measuring cup and stir until the mixture is dissolved.

4. Pour the contents of the measuring cup into the plastic bottle.

5. Place the balloon over the neck of the bottle

6. Place the bottle in a warm, dark place.

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My hypothesis that strawberries would be appropriate for DNA extraction was correct. However, the reason was because strawberries had many cells and it was an advantage when the cells were bring lysed. I could expand this experiment further by researching about the features of cells and DNA.

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egg whites, baking soda, vinegar

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Lemon Juice, orange juice and baking soda

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I hypothesis when put the salt in the ice it melt more fester. My hypothesis is correct. When we put the salt in the ice it melt more faster.

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Most of the water freeze at 0°C. But when we put the slat in the water it freeze at 20°C. So when we put the ice at the salt it melt faster.

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When I put the salt in the the it more melt faster.

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I put the temperature in the ice and temperature going to lower.

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My hypothesis when put the salt in the ice it melt more fester.

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1.Firstly, Put the water in the cups.

2. Secondly, Drop the water in the test cube.

3.And Put the ice two cups.

4. Put the test cups each other.

5. Wait a 5minute.

6.At later recored temperature.

7.Lastly, Look what is different about the two temperature.

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1 )test tube.

2) drinking straw, straight not flexible.

3)1⁄2 cup crushed ice.

4) thermometer.

5) 2 teaspoons of salt.

6) 1 plastic cup 1⁄4 cup water.

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When we put the salt in the ice it more melt faster?

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What impact will the salt give to the water that is in the test tube and how will the temperature change?

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Questions

What affect could salt cause when we put salt in the ice?

Hypothesis

I hypothesize that the salt will make the ice colder.

Material

Teaspoon x 1

Cup x 2

Salt (Any amounts)

Straw x 1

Thermometer x 1

Test tube x 1

Broken ice x 25

Timer x 1

Water

Procedure

1. Pour some water in the cup.

2. Pour some broken ice in the beaker.

3. Put 1/2 water in the jar.

4. Get the straw out and put 5 drops of water in the test tube.

5. Put the test tube and thermometer in each of the ice

cup.

6. Set the timer for 3-5 minutes and observe what happened to the water.

7. Put some salt in the ice and wait for 10 minutes with the timer again.

8. Repeat 3 time.

9. Compare how much does salt amount changes the water.

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I hypothesize that the test tube will become colder and the temperature will get higher if I add salt more and more.

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test tube

1/2 cup crushed ice

thermometer

half cup of salt

1 beaker

1/4 cup water

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1. Pour the water in to the plastic cup

2. Place the straw in the water

3. Hold the upside of the straw(the hole that is not in the water)

4. Place the straw in the test tube and release your finger.

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

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

7. Put the thermometer into the cup of crushed ice also.

8. Wait for 5 minutes. Record the temperature.

9. Add 1pinch of salt into crushed ice

10. Wait for 5 minutes and record the temperature.

11. Add 1pinch more(Salt)

12. Wait for 5minutes and record the temperature.

13. Add 1pinch more(Salt)

14. Wait for 5 minutes and record the temperature.

15. Record observations

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No salt in this picture. The temperature is about 0 degrees.

The inside of the bottle became a bit soggy.

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The place(Some where in the ice) that I sprayed the salt melted. The temperature was simliar. To No salt.

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The ice melted. (It is little hard to see but it melted little bit.) The temperature was higher than 0 degrees. The bottle was unclear.

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Baking soda and Vinegar

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The ice's temperature is 5 celcius.

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Observation 1 (After putting a pinch of salt in the ice)

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Observation 1 (After putting a pinch of salt in the ice)

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The temperature is 0 celcius.

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Observation 2 ( After putting 2 pinches in the ice)

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Observation 2 ( After putting 2 pinches in the ice)

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The temperature has became -1 celcius.

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Observations 3 (After putting 3 pinches of salt in the ice.

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Observations 3 (After putting 3 pinches of salt in the ice.

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The temperature became lower / -2 celcius.

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The Salt water Experiment was successful. The salt made the ice colder and the water's temperature became low.

The salt made the water colder because the salt lower the water's freezing point.

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I hypothesized that the salt will make the water colder. My hypothesis was correct because the water went colder as we putted more salt in the ice. Next time, I would repeat more of putting salt and observing to see if the water freezes next time.

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I observed that the balloon didn't get big

I tnink the bottle was too big to make ballon big.

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What happen to the size of the battery attracks paperclip?

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I hypothesis that if I change the size of the battery the reaction will be different because the amount of the energy is different.

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1. D size battery

2. AA size battery

3. 3feet Wire

4. Large iron nail

5. Small iron nail

6. Ruler

7. Paper clip

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1. Get all the materials

2. grab a wire measure the size of the wire and wrap in the nail

3. cut the 8cm of the wire

4. attach the wire and battery

5. tape the wire into battery* be careful if the wire get hot

point of the nail near a few paper clips

6.observe and record

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https://www.mombrite.com/lego-zip-line-activity/

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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 cage weight can make the zipline go faster?

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I hypothesize that lighter cages can go faster than heavier cages because they may have fewer blocks that stop the zipline.

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The temperature went up. The bottle became more unclear. The ice melted more.

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I observed that salts make ice melt. Because of that, the temperature went up, and there were cold moistures inside of the test tube. The test tube become cold.

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I hypothesized that the temperature will become higher and the test tube will get cold. My observation supported my hypothesize because the temperature was over 0 degrees and the test tube was very cold that there were moistures. The salt melted ice. Next time, I will put more salt and try it with different liquids.

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Electromagnets-A type of magnet when the magnetic field is generated by an electric current

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Does the amount of electric charge inside the battery effect the magnet?

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I hypothesize that it will work, but not as well as when it is fresh.

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3-inch iron nail

3 feet of thinly coated copper wire

Ruler

Scissors

Fresh D-size battery

Fresh AA battery

Used AA battery

Paper clips

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1. Leaving about 8 inches of wire loose at one end (use the ruler to measure), wrap most of the wire around the nail.

2. Cut the wire if needed so that there is another 8 inches loose at the other end

3. Remove 1 inch of the plastic coating with scissors from both ends of the wire.

4. Attach one end of the wire to one end of the used battery, and attach the other end of the wire to the other end of the battery.

5. Tape the wires in place to the battery.

6. Put the point of the nail near a few paper clips.

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All of them worked, but the old ones took longer than the fresh ones.

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I observed that when the wire touches the battery, the electricity flows down the copper and goes to the nail, making it electric. It works with every battery as long as there is enough power inside it, although it will affect how well the magnet works and how long you need to wait.

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I hypothesized that the lightly used battery would work a little bit while the nearly finished one would barely work at all. However, all of the batteries worked, and the only thing that was different was how long they took. So, as long as there is enough energy in the batteries, it will work.

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What happens if you turn it slowly?

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Topic : Biology

Question

How would the yeast and sugar affect the balloon?

Hypothesis

My hypothesis is the yeast and the sugar would affect the balloon by expanding a lot.

Meterials :

✎ 1 package of dry yeast

✎ warm water

✎ 1 tablespoon of water

✎ a 1-liter plastic bottle

✎ large measuring cup

✎ 1 large balloon

✎ small mixing bowl

Procedure

1. Combine the sugar and dry yeast in the mixing bowl.

2. Measure 1 cup of warm water using the measuring cup.

3. Add the yeast/sugar mixture to the measuring cup and stir until the mixture is dissolved.

4. Pour the contents of the measuring cup into the plastic bottle.

5. Place the mouth of the balloon over the neck of the bottle

6. Place the bottle in a warm, dark place.

7. Observe the bottle every 15 minutes for the next few hours to look for changes in the size of the balloon.

8. Check the balloon the next day and observe any changes.

Analysis

I observed that the balloon was expanding straightly. The balloon becomes bigger and have some bubbles because the yeast eats the sugar then make a carbon dioxide.

Conclusion

I hypothesized that yeast and the sugar would affect the balloon by expanding a lot. My hypothesis was correct but there was a unusual thing happen it was the balloon was expanding straight and puffy.

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When I connect the wire and battery the battery energy moves to copper wire and the power of battery finally send to the paper clips. The bigger the battrey matter because the battery attracts more paper clips.

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I hypothesized was that the balloon will pop if we put a lot of yeast and sugar in it. But it did't pop and just get bigger and the bubble were in the top of the bottle.I could conclude that the more sugar and yeast will help it make more bigger.

In future, I could put more yeast and more sugar because i think it will get to make a lot of bubble and make the balloon expand.

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1cup

water

string

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I saw the balloon was expanding straight and puffy posture while I was doing the experiment. I was wondering why my one is only the one expanding straight and puffy posture.

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Will sugar yeast and more gas will make the balloon bigger?

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My hypothesis is that the balloon will pop if we put a lot of yeast and sugar in it.

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2 package of dry yeast

1 spoon of sugar

warm water

1 tablespoon of water

a 1-liter plastic bottle

large measuring cup

1 large balloon

small mixing bowl

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1. Combine the sugar and dry yeast in the mixing bowl

2. Measure 1/2 cup of warm water using the measuring cup.

3. Add the yeast/sugar (1/2 of pact of yeast) mixture to the measuring cup and stir until the mixture is all mixed.

4. Pour the mixed yeast and sugar on the measuring cup into the plastic bottle.

5. Place the mouth of the balloon over the neck of the bottle

6. Place the bottle in a warm, dark place.

7. Observe the bottle every 15 minutes for the next few hours to look for changes in the size of the balloon.

8. Check the balloon the next day and observe how much the balloon grow.

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The bubbles make the balloon a lot bigger

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I could observe that the when i put water in the bottle the balloon expend. and the bottle is warm.

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I could observe that the more sugar and yeast help the balloon grow and the warm water really have to be warm

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LEGO bricks

LEGO Minifigure

Piece of thick string

Scale

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1. Build a cage.

2. Weigh the cage.

3. Put the LEGO minifigure in the cage.

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

5. Thread the string through the hole.

6. Pull the string so it’s taut and hold the loose end tightly and on a decline.

7. Push the cage to the highest point of the string.

8. Let go of the cage and time it when it slides down the zip line.

9. Record the results.

10. Repeat it with different weights.

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I hypothesized that the lighter cages would slide down the yarn faster. However, the heavier cages were faster according to Newton's second law. Next time, I can try it with more weights or different types of yarn. Unless the zipline cage gets stuck in the middle, the heavier, the faster.

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I observed that the 61g zipline went down faster than the 46g zipline because Newton's second law relates force, mass, and acceleration and how your speed changes depending on your mass and the force applied. However, the 51g zipline took longer because it stopped in the middle for a while and went down again slowly.

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i observe that when to yeast and sugar mix and to water it make yeast to eat the sugar and yeast makes gas and that makes bubbles that makes the balloon expand

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1. Put in the yeast and sugar in the mixing bowl.

2. Fill the measuring cup with 1 cup of warm water.

3. Add the yeast and sugar mixture to the measuring cup and stir until the mixture is dissolved

4. Pour the liquid from the cup into the mixing bowl.

5. Place the mouth of the balloon over the neck of the bottle.

6. Place the mixing bowl in a warm and dark place.

7. Check the bottle every 15 minutes for a few hours to see if the balloon changes size.

8. Check the balloon the next day and observe any changes.

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What will the yeast and sugar affect the balloon?

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DNA

Question- Which fruits would be suitable for extracting DNA?

Hypothesis

I hypothesize that strawberries that contain a lot of water would be suitable when extracting DNA because the liquid from the fruit would be mixed well with the DNA extracting liquid.

Materials

-2 strawberries

-2 limes

-2 grapes

-3 resealable plastic bags

-2 teaspoons of dish washing detergent.

-1/2 cups of water

-2 plastic cups

-1 coffee filter

-1/2 cups of rubbing alcohol.

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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.