Diagnostic Test - 9no

The diagram shows a side view of the human skeleton. On the diagram, identify a hinge joint and a ball-and-socket joint.

a

b

hinge joint

ball-and-socket joint

Two muscles work together to move the bones at a hinge joint.

What is the term used to describe these two muscles?

Which two nutrients in the list are used as a store of energy in animals?

Which nutrient is needed to make strong muscles, and for growth?

Name one vitamin and describe its function.

Name the gas that limewater tests for.

Suggest why Arun used four test tubes in his experiment, rather than two.

Describe two variables that Arun needed to keep the same in his experiment.

Arun measured the time taken for the limewater to go cloudy in each tube.

These are his results.

A 6 minutes

B 6½ minutes

C 8½ minutes

D 9 minutes

Complete the results table, to show Arun's results.

Write a conclusion that Arun can make from his results.