Scientific Variables

In an experiment to test how different amounts of sunlight affect plant growth, what is the independent variable?

• Amount of water given to the plants

• Amount of sunlight the plants receive

• Type of soil used

• Height of the plants

What is the dependent variable when studying how temperature affects sugar's solubility in water?

• Amount of sugar

• Temperature of the water

• Time taken for sugar to dissolve

• Amount of sugar dissolved

In a study on water quality, what is a controlled variable?

• Type of fish

• Water temperature

• Fish health

• Amount of food given to fish

What is the dependent variable in the experiment testing different fertilisers on crop yield?

• Type of fertiliser

• Amount of water

• Crop yield

• Type of crop

In an experiment to see how different genres of music affect plant growth, what is the independent variable?

• Type of music played

• Growth rate of the plants

• Amount of sunlight

• Type of plant

When testing how different washing powders affect the cleanliness of clothes, what is the dependent variable?

• Type of washing powder

• Temperature of the water

• Cleanliness of the clothes

• Type of fabric

In a study on the effect of water acidity on aquatic life, what is the independent variable?

• Type of aquatic life

• Acidity of the water

• Water temperature

• Amount of sunlight

A student is investigating how different soil types affect plant growth. What is the controlled variable?

• Type of soil

• Amount of water

• Plant growth

• Type of plant

In an experiment to see how temperature affects the solubility of salt in water, what is the controlled variable?

• Temperature of the water

• Amount of salt

• Type of salt

• Volume of water

When testing the effect of different irrigation methods on crop growth, what is the independent variable?

• Type of crop

• Irrigation method

• Crop growth

• Soil type