Organisms 8.4

Question 1

Gas exchange: oxygen is exchanged with the gas…

Answer 1

Carbon dioxide because carbon dioxide is a waste product

Question 2

Where does gas exchange takes place

Answer 2

Gas exchange takes place in the alveoli

Question 3

You inhale …….%. Percent oxygen

Answer 3

21%

Question 4

You exhale…% oxygen

Answer 4

16%

Question 5

You inhale…% carbon dioxide

Answer 5

0.04%

Question 6

You exhale…% carbon dioxide

Answer 6

4%

Question 7

You inhale…% nitrogen

Answer 7

78%

Question 8

How much nitrogen do you exhale?

Answer 8

The same without you inhale 78%

Question 9

Name three adaptions of the alveoli

Answer 9

Then walls so gas exchange can take place quickly, moist allows gasses to dissolve and has a large surface area to allow gas the past through

Question 10

Digestive system:

The food enters the body through the _____________ then it travel down the _____________.

Answer 10

Mouth

Gullet/oesophagus

Question 11

After the food has traveled down the gullet it enters the ___________.

Answer 11

Stomach

Question 12

What happens to food in the stomach?

Answer 12

The stomach is a muscular bag for food it is full of acid. The food is mixed with the hydrochloric acid and the stomach contracts and relaxes. The acid breaks down the food and the microbes are destroyed.

Question 13

What does the large intestine do?

Answer 13

The large intestine absorbs the water and puts it in the blood.

Question 14

What happens in the small intestine?

Answer 14

Small digested food molecules are absorbed into the bloodstream.

Question 15

What does gut bacteria do?

Answer 15

It lives in intestine and helps to break down the food

Question 16

What is thermo decomposition?

Answer 16

It is the breakdown of the substance using heat.

Question 17

What is meant by conservation of mass?

Answer 17

The total mass of the reactants will be the same as the total mass of the products. This is because mass has not been created or destroyed. In a chemical reaction atoms are rearranged to produce new substances

Question 18

When you balance equations can you change the subscript numbers?

Answer 18

Nope

Question 19

What is an endothermic reaction?

Answer 19

Reaction that take in heat.

Ice pack

Question 20

What’s an exothermic reaction?

Answer 20

Reactions that give out heat. The heat EXits.

Question 21

What the word equation for aerobic respiration?

Answer 21

Glucose+oxygen———>carbon dioxide +water (+energy)

Question 22

What is the equation for oxygen debt?

Answer 22

Latic acid+oxygen ——-> carbon dioxide + water

Question 23

Word equation for photosynthesis is….

Answer 23

Carbon dioxide + water —-> glucose + oxygen

Question 24

Fermentation equation is…

Answer 24

Ethanol+carbon dioxide—-> glucose

Question 25

What do guard cells do ?

Answer 25

Open and close stomata

Question 26

What do stomata do ?

Answer 26

Control carbon dioxide intake

Question 27

How do you calculate work done ?

Answer 27

W= f x d

Question 28

Temperature is

Answer 28

The measure of the internal energy of a substance

Question 29

If something feels hot heat is being transferred from the object to your hand. True or false

Answer 29

True

Question 30

Where does photosynthesis take place?

Answer 30

In the chloroplasts

Question 31

What do the chloroplasts contain ?

Answer 31

Chlorophyll

Question 32

What does chlorophyll do?

Answer 32

Traps light for photosynthesis.

Question 33

Ina leaf: what does the palisade layer do?

Answer 33

It is where most the chloroplasts are meaning photosynthesis occurs there.

Question 34

What does the spongy layer do?

Answer 34

Contains air allowing carbon dioxide to diffuse through the leaf.

Question 35

Why is the top of the leaf waxy?

Answer 35

To protect the leaf from extreme weather.

Question 36

Why are most leaves green?

Answer 36

As they contain chlorophyll