Use the drawing to answer the question. A student wants to compare how long a flashlight will continue to shine using different brands of batteries. How can the student make sure that the test is fair?

B. Test each brand of batteries in the same flashlight.

A. Test the same brand of batteries in two flashlights.

C. Test different sizes of batteries in the same flashlight.

D. Test whether some flashlights can work with only one battery.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?

Type of plant, amount of music, and sunlight

Students are growing plants in the dark or in the light to see which grows better. They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light. How could this experiment be improved?

Put the same number of seeds in each container.

Put all plants in the dark (where they sprout better)

put all the plants in the light so they grow better

Students put two plants in the sun. Plant A is in the sun for 10 minutes. Plant B is in the sun for 1 hr. Students decide that plant B is better at photosynthesis. This is wrong because...

They didn't control all variables

The independent variable was sunlight

The dependent variable was amount of gas produced

they used different amounts of water

Why are approved eye protection devices (such as goggles) are worn in the lab?

D. To protect eyes around chemicals, heat, or glassware

Theo placed two of the same beakers of solution outside next to each other for 15 minutes. Each beaker had the same amount of solution. One beaker was covered with black paper and one was covered with white paper. He then took the temperature of the water. What was the variable in the experiment?

The amount of solution in the beakers

Another useful property of metals is that they are ductile. What does this mean?

They can be stretched into wires

Magnesium chloride + Sodium → ?

Magnesium chloride + Sodium (No change)

Lithium chloride + Iron → ?

Lithium chloride + Iron (No change)

is a renewable source of energy

is less expensive than fossil fuels

is difficult to utilize in areas with low wind availability

utilizes small or large areas of land not previously used

Which is an advantage of installing solar panels?

Reduced amount of air polllution

Science Revision Year 9

Authored by Mr Davies

Biology, Physics, Chemistry

7th - 11th Grade

NGSS covered

Used 289+ times

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60 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an experiment, the one thing "I" change or manipulate is the...

Independent Variable

Dependent Variable

Constant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What a scientist finds out at the END of an experiment is the...

Independent Variable

Dependent Variable

Constant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an experiment, the things a scientist purposefully keeps the same are the...

Independent Variable

Dependent Variable

Constant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During an experiment, scientists know it is important to...

Forget Information

Collect Data

Only do the experiment once

During experiments, scientists write down what they see which is called...

Hypothesis

Observations

Materials

Procedure

During an experiment to see which type of food a dog likes best, using different types of dog food would be an example of a/an ..............

Independent Variable

Dependent Variable

Constant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which unit should you use to measure the length of the classroom?

Millimeter (mm)

Centimeter (cm)

Meter (m)

Kilometer (km)

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Science Revision Year 9

In an experiment, the one thing "I" change or manipulate is the...

What a scientist finds out at the END of an experiment is the...

In an experiment, the things a scientist purposefully keeps the same are the...

During an experiment, scientists know it is important to...

During experiments, scientists write down what they see which is called...

During an experiment to see which type of food a dog likes best, using different types of dog food would be an example of a/an ..............

Which unit should you use to measure the length of the classroom?

Which instrument is used to measure the mass of an object?

Which unit should be used to measure the amount of soda in a can?

What is room temperature in Celsius?

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