7G1 (science ) by Hanen Sabry

Hanen Sabry

laranoureddin — 2020-05-12 10:35:55 UTC

1. why are car radiators painted black
to absorb heat black is a good absorber and radiators of heat.

Hanen Sabry

annelieseaala — 2020-05-12 10:35:55 UTC

Why houses in hot countries are painted white?

The houses in hot countries are painted white because the color white cannot absorb heat and is a good reflector.

zaenabrehan — 2020-05-12 10:35:55 UTC

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Why do shiny teapots keep tea warmer than black teapots?

Thermal energy /Internal energy: energy stored in the movement of particals.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Heat transfer: It is the transfer of thermal energy from a hot object to a cold object.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Temperature is how hot or cold an object is.
It is the measure of average kinetic energy of an object.

hanen

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Why houses in hot countries are painted white?
houses are painted white because white is a good reflector and doesn't absorb heat.

Hanen Answers

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Why are shiny foil blankets wrapped around marathon runners?
To make sure the heat from their body does not escape.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Why are car radiators painted black?

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 3 Q4 : Susie is using a solar calculator. It is 75% efficient , transferring 12J of the total energy into useful output energy. Calculate the total energy input, giving your answers in Joules.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 3 Q3 : Rupert has a remote controlled car. It is 35 % efficient, transferring 90J of the total energy into useful kinetic energy. Calculate the total energy input , giving your answer in joules.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 3 Q2: Hanen bought new speakers for her car. the output of the speaker is 550J. The total energy input is 0.85kJ. Calculate the percentage efficiency.

Level 3 Q1: Maria has brought a new drill for work. the total input energy is 1.8 kJ. The useful output energy is 800J. Calculate the percentage efficiency of the drill.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 2: Q2 Joe is making toast for his breakfast. The toaster uses 500J energy to brown the bread. A total of 750J energy is input to the toaster. Calculate the percentage efficiency of the toaster.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 2: Q1 The total input energy of Haya's hair straightener is 1600J. 1200J are transferred usefully as heat energy. Calculate the percentage efficiency of hair straighteners.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Write all the steps and show the calculations.
Always check the units!

Level 1: Q3 A modern efficient light bulb transfers 9J of energy by light every second. It uses 20J of energy to do this. Calculate the efficiency of the bulb.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 1 Q2:

priyaguptaisgi — 2020-05-12 10:35:55 UTC

These Sankey diagrams show the energy transfers in two televisions. Each television is supplied with 100 J of energy.

a. Which energies are the useful energy transfers? Ans.
b. Which TV is the most efficient?

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Level 1 Q1 What does the efficiency of an appliance tell you ?

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Identify the  wasted energy stores in the following examples.

Q1 A television has a power input of 140 W. What is the energy transfer if the television is switched on for 120 seconds?

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Hanen Sabry

2020-05-12 10:35:55 UTC

It would be 16,800 w

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Comment on importance of fungi in human life.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Hanen's Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Yeast is a single-celled fungus. It is able to ferment sugar, producing alcohol and carbon dioxide in the process. It has long been used to make beer and wine as well as bread (the carbon dioxide causes the dough to rise).

Yeasts are used in the fermentation of fruits to produce wines, cereals to make beer, in bread manufacture and flavoring in the form of yeast extract. Filamentous fungi are used in traditional processes for the ripening of cheeses and in the production of enzymes used in the food industries

Bad fungi are really bad! Some mushrooms can make you sick, even though they look safe to eat. ... If fungi get inside your body, they can cause serious problems. Fungi love animals and plants too - lots of crops are damaged every year because fungi have attacked them!

2020-05-12 10:35:55 UTC

Fungi can produce antibiotics

Blue cheese is a type of cheese with a fungus called Penicillium added to it. The fungus makes patches or veins of it look blue. The cheese can be made from cow's milk, sheep's milk, or goat's milk. Types of it include Roquefort cheese, Stilton cheese, and Gorgonzola cheese

2020-05-12 10:35:55 UTC

Hanen

mariasarkis — 2020-05-12 10:35:55 UTC

fungi plays important role in the ecosystem

Hanen's Sabry

hanensabry — 2020-05-12 10:35:55 UTC

uae considers quinoa as the futre of food because : its ability to grow in high heat and arid soil. It also requires little water to grow — and can adapt to very salty water

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Why mushrooms are considered as decomposers?

Describe the two types of respiration Fungi uses.

priyaguptaisgi — 2020-05-12 10:35:55 UTC

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

North America is home to three of the major endemic mycoses: histoplasmosis, blastomycosis, and coccidioidomycosis. Their prevalence var- ies by region. These three endemic fungal diseases share many characteristics. Illness is acquired by inhaling aerosolized spores.

Mushrooms are considered as decomposers because they break down/ decompose organic materials

2020-05-12 10:35:55 UTC

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Aerobic respiration, it is a type of respiration in which oxygen is required and they release carbon dioxide+ water (+energy).

Anaerobic respiration, it is a type of respiration in which not a lot of oxygen is required. The anaerobic respiration of microorganisms is called fermentation.

Hanen's Sabry

hanensabry — 2020-05-12 10:35:55 UTC

it enters through diffusion

Meaning of symbiotic relationship:

2020-05-12 10:35:55 UTC

Symbiotic relationships are a special type of interaction between species
Sometimes it can be beneficial, sometimes it can be harmful

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Q )How symbiotic relation between fungi and plants help in increasing crop yield?

A) Most crops can form symbiosis with fungi to gain key nutrients. The fungi in turn gain carbohydrates generated through the plant's photosynthesis. This type of symbiosis is called arbuscular mycorrhizas and is of key importance to sustainable agriculture since it helps crops utilise better the phosphate in fertilisers

Mycorrhizae are symbiotic relationships that form between fungi and plants. The fungi colonize the root system of a host plant, providing increased water and nutrient absorption capabilities while the plant provides the fungus with carbohydrates formed from photosynthesis.

The fungus grows in or on the plant roots. The fungus benefits from the easy access to food made by the plant. The plant benefits because the fungus puts out mycelia that help absorb water and nutrients. Scientists think that a symbiotic relationship such as this may have allowed plants to first colonize the land

priyaguptaisgi — 2020-05-12 10:35:55 UTC

hanensabry — 2020-05-12 10:35:55 UTC

how does oxygen get into a unicellular organisms

Hanen Sabry

lakshmigayathri — 2020-05-12 10:35:55 UTC

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Q) Which liquid is produced when yeast cells ferment .

A) n addition to oxygen, they require a basic substrate such as sugar. Some yeasts can ferment sugars to alcohol and carbon dioxide in the absence of air but require oxygen for growth. They produce ethyl alcohol and carbon dioxide from simple sugars such as glucose and fructose.

(ethyl alcohol )

THIS GRID IS AMAZING IT'S EASIER TO LEARN AND HAVE FUN IN THE SAME TIME !!!😀💖

hanensabry — 2020-05-12 10:35:55 UTC

(Hanen)

explain why the influenza virus damages the tissues in it's host

hanensabry — 2020-05-12 10:35:55 UTC

Which liquid is produced when yeast cells ferment?

priyaguptaisgi — 2020-05-12 10:35:55 UTC

2020-05-12 10:35:55 UTC

why might a unicellular organisms need oxygen ?

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

a unicellular organisms need oxygen for respiration .

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Viruses depend on the host cells that they infect to reproduce. ... When it comes into contact with a host cell, a virus can insert its genetic material into its host, literally taking over the host's functions. An infected cell produces more viral protein and genetic material instead of its usual products.

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Fermenters. Microbes can be used by industry to mass produce certain important chemicals. Some of these, like insulin are used in medicine to treat patients. ... Microbes and nutrients are put into the fermenter and air is bubbled through so that the microbes can respire aerobically.

Well done Hanen

Now research about how Penicillin is produced by growing Fungi in an industrial fermenter

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Industrial fermenters. Fermenters are containers used to grow bacteria and fungi in large amounts, eg Penicillium mould for producing penicillin (an antibiotic). ... This removes fungal cells, leaving the product penicillin which will need to be treated chemically before use.

hanensabry — 2020-05-12 10:35:55 UTC

miss please post more Questions 🙏🏻

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

The structure of the unicellular is made up of a single cell. The structure of the multicellular organisms is made up of numerous cells. ... Amoeba, paramecium, yeast all are examples of unicellular organisms. Few examples of multicellular organisms are human beings, plants, animals, birds, and insects.

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

watch this it's good

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

this is how a type of multicellular looks like

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

watch it

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

check this out it's really helpful

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

this is what they do when they fell an animal that is going to eat them is close by (i'm not sure about it ) this layer is very poisonous

hanensabry — 2020-05-12 10:35:55 UTC

is a fungi multicellular or unicellular ?

Hanen Sabry

hanensabry — 2020-05-12 10:35:55 UTC

Fungi live as either single-celled organisms or multicellular organisms. Single-celled fungi are referred to as yeasts. The vast majority of fungi are multicellular. Most of the body of a fungi is made from a network of long, thin filaments called 'hyphae' ( this is a hyphae)

Hanen Sabry

hanensabry — 2020-05-15 13:40:26 UTC

a: pillus : holds bacteria together for reproduction .

b: ribosomes : makes protien .

c: nucleoid : where DNA is housed. It lacks the membrane that is found around the nucleus of eukaryotic cells.

d: flagellum: a whip-like structure that allows a cell to move

e: murein cell wall : serves a structural role in the bacterial cell wall, giving structural strength, as well as counteracting the osmotic pressure of the cytoplasm.

f: plasma membrane. to protect the cell from its surroundings , it allows nutrients .
acting as a permeability barrier for most molecules and serving as the location for the
transport of molecules into the cell.

hanensabry — 2020-05-15 13:40:43 UTC

Extension Task

hanensabry — 2020-05-15 13:40:56 UTC

Level 1 Support sheet

Level 1 Label the structure of Bacteria

hanensabry — 2020-05-15 13:41:04 UTC

Lactic Acid Fermentation vs. Alcoholic Fermentation

hanensabry — 2020-05-15 13:41:17 UTC

Alcoholic fermentation occurs in plants and yeast.
It takes glucose and converts it into ethanol, carbon dioxide and energy

Lactic acid fermentation occurs in animals and humans.
It takes glucose and converts it into lactic acid and energy.
Kate

Level 2: What is the difference between alcoholic fermentation and lactic acid fermentation.

hanensabry — 2020-05-15 13:41:24 UTC

Level 2: Support sheet

hanensabry — 2020-05-15 13:41:31 UTC

Video on lactic acid and alcoholic fermentation.

hanensabry — 2020-05-15 13:41:36 UTC

hanensabry — 2020-05-15 13:41:43 UTC

Binary Fission: Asexual reproduction in Bacteria