Grade 7 PHSC June Exam Revision

Which of the following is NOT a physical property of a material?

• Colour

• Ability to decompose

• Density

• Conductivity

If a material is biodegradable, what affect does it have on the environment?

• It reduces pollution

• It increases pollution

• It has no effect on pollution

• Al these answers could be correct

Which method of separation is used to separate a mixture of sand and salt?

• Filtration

• Distillation

• Evaporation

• Magnetism

What is the term for the process of physically separating a mixture using the method in the picture?

• Filtration

• Sieving

• Evaporation

• Magnetism

Which of the following is a method of physical separation used for separating a mixture of iron nails?

• Filtration

• Distillation

• Decantation

• Magnetism

What is the purpose of sorting materials for recycling?

• To reduce waste

• To increase pollution

• To increase landfill space

• To decrease resource usage

Which substance is commonly used as an acid-base indicator?

• Sugar

• Water

• Litmus Paper

• Salt

What is the taste of an acidic substance?

• Sweet

• Sour

• Bitter

• Salty

Which of the following is a property of acids?

• They turn blue litmus paper red

• They feel slippery

• They have a pH greater than 7

• They taste sweet

When red litmus paper is dipped into a solution, nothing happens. What does this mean? Choose the most correct answer.

• The solution is a base or neutral

• The solution is neutral

• The solution is an acid

• The solution is an acid or neutral