Revision 1

What is an alloy?

• a mixture of gases

• a mixture of metals

• a mixture of non-metals

• a mixture of compounds

Which of the diagrams shows an alloy?

• A

• B

the variabale that you keep the same

• control variable

• dependent variable

• independent variable

the variable that you change

• control variable

• dependent variable

• independent variable

the variable that is measured/observed

• control variable

• dependent variable

• independent variable

Below are questions you should ask when designing an experiment.

How will I make sure the experiment is ​ (a)   ?

What​ (b)   do I need?

How will I stay ​ (c)   ?

What will I ​ (d)   in the investigation, and what should I keep ​ (e)  

• fair
• equipments
• safe
• change
• the same
• fun
• results
• entertained

Match the descriptions with the terms.

• A volcano that may erupt at any time

• inactive/dormant

• a volcano that has not erupted for a long time

• active

• a volcano which will never erupt again

• extinct

Which of the following is the unit for weight?

• N

• N/kg

• kg

Which of the following is the unit for mass?

• N

• N/kg

• kg

A shadow can form when a(n)​ (a)   object passes in front of a source of light.

• opaque
• transparent
• translucent