Thuy Vy science 7

Which organisms are producers?

Name three predators of the lizard?

A disease decreases the number of kit foxes.

What will happen to the size of the snake population?

A disease decreases the number of kit foxes.

the size of the snake population will increase. Why?

Draw a food chain from the food web which contains only five tropic levels.

The particles are spreading out.

What is the name of this process?

• condensation

  (ngưng tụ)

• diffusion

  (khuếch tán)

• fermentation

  (lên men)

• neutralisation

  (trung hòa)

The particles in a solid cannot spread out in the same way.

Tick two reasons why particles in a solid cannot spread out.

• The particles are already too far aprt.

• The particles in a solid do not move around.

• Solids have a fixed shape

• Solids can only take on the shape of a container.

• Pressure in a solid is too great.

Name process A

Name process B

Which sound has the highest amplitude (biên độ) and highest frequency?

Letter ...............