The Scientific Method Review

What is the independent variable in an experiment testing the effect of sunlight on plant growth?

• The amount of sunlight

• The type of soil

• The temperature of the water

• The color of the plant pot

Which of the following is the dependent variable in an experiment measuring the impact of exercise on heart rate?

• Type of exercise

• Heart rate

• Time of day

• Temperature

In an experiment testing the effect of temperature on ice melting, what is the independent variable?

• Temperature

• Volume

• Pressure

• Time

What is the hypothesis in an experimental scenario investigating the relationship between caffeine consumption and reaction time?

• Decreased caffeine consumption will lead to an increase in reaction time.

• Caffeine consumption will lead to no change in reaction time.

• Caffeine consumption has no effect on reaction time.

• Increased caffeine consumption will lead to a decrease in reaction time.

In an experimental scenario studying the effect of fertilizer on plant growth, what is the claim?

• The claim is the effect of water on plant growth.

• The claim is the fertilizer increases rate of plant growth.

• The claim is the effect of temperature on plant growth.

• The claim is the effect of sunlight on plant growth.

What is the independent variable in an experiment testing the impact of music on concentration?

• The lighting in the room

• The volume of the music

• The duration of the experiment

• The type of music being played

Which of the following is the dependent variable in an experiment measuring the effect of sleep on memory retention?

• Amount of sleep

• Time of day

• Type of memory

• Memory retention

In an experiment testing the effect of different brands of detergent on stain removal, what is the control variable?

• Temperature of the water used

• Amount of detergent used

• Type of fabric or material used for the stains

• Color of the detergent

What is the hypothesis in an experimental scenario investigating the relationship between sugar consumption and energy levels?

• Sugar consumption has no effect on energy levels.

• A possible hypothesis could be: 'Increased sugar consumption will lead to higher energy levels.'

• Increased sugar consumption will lead to lower energy levels.

• Decreased sugar consumption will lead to higher energy levels.

In an experimental scenario studying the effect of temperature on the rate of yeast fermentation, what is the claim?

• The claim is that temperature only affects the color of yeast fermentation.

• The claim is that temperature has no effect on the rate of yeast fermentation.

• The claim is that temperature increases the rate of yeast fermentation exponentially.

• The claim is that temperature affects the rate of yeast fermentation.