NS- Practice test

Process by which green plants make food

photosynthesis

Gas released during photosynthesis

oxygen

Energy absorbed by plants for the manufacture of food

radiant energy

Green pigment present in leaves that absorb sunlight

chlorophyll

Requirement for photosynthesis absorbed by the roots of a plant

water

Excess glucose stored in the roots and fruits of plants

starch

The main product of respiration

energy ATP

The organelle responsible for respiration

mitochondrion

Explain TWO reasons why photosynthesis is an important biological process.

1. Balances gases in the atmosphere (1) by absorbing carbon dioxide and
releasing oxygen. (1)
2. Provides food (1) either directly or indirectly for all living organisms. (1)

Explain what happens to each of the following products of respiration:
a. Energy

released in the cell and is used to carry out all life processes

Explain what happens to each of the following products of respiration:

(1) b. carbon dioxide

waste product in animals that is exhaled/breathed out/released into atmosphere (1), green plants may use for photosynthesis

Tabulate THREE differences between photosynthesis and respiration

Table showing the differences between photosynthesis and respiration (1)

Photosynthesis Respiration
1. occurs during the day only 1. occurs during day and night
2. only carried out by green plants 2. Carried out by all living organisms
3. carbon dioxide absorbed/oxygen
released
3. Oxygen required/carbon dioxide
released
4. chemical potential energy 4. Energy produced in for of ATPproduced in form of glucose
5. organelle responsible is
chloroplast
5. Organelle responsible is mitochondria

Define Organelle

large structure within a cell (1) that carries out a specific
function

Define Molecule

2 or more atoms (1) chemically bonded to form a unit

Define decomposition

reaction where a compound is broken down (1) into the

elements it is made from

Define structural adaptation

specific feature in body design (1) that it suited to a

specific function to help and organism survive in it environment

Define mimicry

an organism misleads predators (1) by imitating the color/sgape/behavior of a harmful organism.

Define chemical bond

strong force of attraction (1) that holds atoms together

List THREE observations that can be made when a chemical reaction takes
place.

1. Gas bubbles are produced
2. A colour change
3. A smell/odour is produced/changes
4. A temperature change
5. A sound is produced
6. A precipitate forms

Describe ONE structural adaptation of a frog.

1. Long sticky tongue (1) to capture prey (1)
2. Webbed feet (1) to swim (1)
3. Strong back legs (1) to jump towards prey (1)

State the aim

To determine/investigate the effect of

List TWO planning steps

The amounts of

How to

validity

The same

Name the gas produced after cell respiration

Carbon dioxide