Writing a Scientific Hypothesis Practice Quiz (4 questions)

Question 1

1. A student investigates how warming water affects sugar dissolving and expects warmer water to make the sugar dissolve faster. Which hypothesis matches this example?

If sunlight increases, then sugar will dissolve faster because warmer water helps sugar dissolve more quickly.

If water temperature increases, then a plant will grow taller because warmer water helps sugar dissolve more quickly.

If water temperature increases, then sugar will dissolve faster because warmer water helps sugar dissolve more quickly.

If water temperature increases, then sugar will dissolve more slowly because warmer water helps sugar dissolve more quickly.

Explanation

The water-temperature hypothesis predicts faster sugar dissolving as water temperature increases, because warmer water helps sugar dissolve more quickly. The slower-dissolving option reverses the prediction, the plant-growth option changes the outcome, and the sunlight option substitutes a different factor.

Answer

If water temperature increases, then sugar will dissolve faster because warmer water helps sugar dissolve more quickly.

Question 2

2. A student is planning an experiment and states what they expect will happen when they change a condition. What is this prediction called?

A hypothesis

A conclusion

An observation

A procedure

Explanation

A hypothesis is a prediction about what will happen in an experiment. An observation records what is noticed, a procedure describes steps, and a conclusion interprets results.

Answer

A hypothesis

Question 3

3. In the hypothesis “If the amount of sunlight increases, then a plant will grow taller because sunlight helps plants make food,” what is the independent variable?

The plant’s height

Sunlight helping the plant make food

The prediction about plant growth

The amount of sunlight

Explanation

The independent variable is what is changed in the experiment, here the amount of sunlight. Plant height is the expected outcome, while the food-making statement gives the reason.

Answer

The amount of sunlight

Question 4

4. A student tests whether plants receiving more sunlight grow taller, reasoning that sunlight helps plants make food. Which hypothesis best matches this investigation?

If a plant gets more sunlight, then it will grow taller because sunlight helps plants make food.

If a plant gets more sunlight, then it will grow shorter because sunlight helps plants make food.

If water temperature increases, then a plant will grow taller because sunlight helps plants make food.

If a plant gets more sunlight, then it will grow taller because warmer water dissolves sugar more quickly.

Explanation

The plant-growth hypothesis predicts that more sunlight will lead to greater plant height because sunlight helps plants make food. The shorter-growth option reverses the prediction, the water-temperature option changes the investigation, and the warmer-water reason belongs to a different example.

Answer

If a plant gets more sunlight, then it will grow taller because sunlight helps plants make food.

Writing a Scientific Hypothesis Practice Quiz (4 questions)

All questions and answers

1. A student investigates how warming water affects sugar dissolving and expects warmer water to make the sugar dissolve faster. Which hypothesis matches this example?

2. A student is planning an experiment and states what they expect will happen when they change a condition. What is this prediction called?

3. In the hypothesis “If the amount of sunlight increases, then a plant will grow taller because sunlight helps plants make food,” what is the independent variable?

4. A student tests whether plants receiving more sunlight grow taller, reasoning that sunlight helps plants make food. Which hypothesis best matches this investigation?

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