Science Experiment Variables Quiz

Aim: To see if different types of soil make a bean plant grow taller. Which is the Changed Variable in this experiment?

• The height the bean plant grows.

• The amount of water the plant gets.

• The type of soil used for each plant.

• The size of the pot.

Aim: To find out if different amounts of water affect how fast sugar dissolves in a cup. Which must be a Changed Variable to make this a fair test?

• The amount of sugar used in each cup.

• The amount of water in each cup.

• The time it takes for the sugar to dissolve.

• The person dissolving the sugar.

Aim: To see if a ball rolls faster on wood, carpet, or tile floors. Which is the Changed Variable in this experiment?

• The type of floor (wood, carpet, tile).

• The type of ball used.

• The distance the ball travels.

• The time it takes for the ball to roll a certain distance.

Aim: To see if different amounts of fertiliser change the number of flowers a plant grows. Which are the Constant Variables? [Select more than one answer]

• The type of plant.

• The amount of fertiliser given to each plant.

• The place where the plants are kept (sunlight).

• The number of flowers grown.

Aim: To find out if putting a piece of bread in different places (fridge, counter, window) affects how fast mould grows. What is the main Constant Variable you should keep the same?

• The place where the bread is kept.

• The size or type of bread.

• The amount of mould that grows.

• The temperature of the air.

Aim: To find out how the size of a tissue paper (small, medium, large) affects how long it takes to drop. What is the Measured Variable?

• The size of the tissue paper.

• The height the tissue paper is dropped from.

• The weight of the object tied to the parachute.

• The time taken for the tissue paper to reach the ground.

Aim: To see if putting ice cubes in different containers (glass, plastic, metal) changes how fast they melt. Which is the Changed Variable?

• The container material (glass, plastic, metal).

• The size of the ice cube.

• The time it takes for the ice cube to melt.

• The room temperature.

Aim: To find out if different colour crayons melt faster under a lamp. Which is the most important Constant Variable?

• The colour of the crayons.

• The time it takes for the crayon to melt.

• The distance of the lamp from each crayon.

• The brand of the lamp.

Aim: To see if different liquids (water, juice, oil) make a piece of paper tear more easily. What is the Measured Variable?

• The liquid used (water, juice, oil).

• The type of paper used.

• The strength needed to tear the paper.

• The amount of liquid put on the paper.

Aim: To find out if thicker string can hold more weight than thinner string. Which is the Changed Variable?

• The thickness of the string.

• The material of the string (e.g., cotton or plastic).

• The weight the string can hold before breaking.

• The length of the string.