Landon conducted an experiment with salt. Which of the following is a testable question that could be answered with his experiment?

• Does salt taste good?
• Will the amount of salt added to a solution increase it's conductivity?
• Which brand of salt satisfies the craving for salt users?
• Why do people in some countries use more or less salt?

Tags

NGSS.MS-PS3-4

What do air, glass and water have in common?

• They are elements.
• They are all gases at room temperature.
• They all allow light to pass through them.
• They are all made up of the same atom.

Tags

NGSS.MS-PS4-2

DNA technology has improved greatly in recent years. Which task has been made easier by the development of DNA technology?

• Identifying genetic disorders.
• determining the parts of an atom.
• observing distant objects in space.
• making very accurate measurements.

Tags

NGSS.HS-LS3-2

When the temperature of water changes from 10 degrees Celsius to -10 degrees Celsius, the water changes from a...

• solid to a gas.
• a liquid to a gas.
• a liquid into a solid.
• a solid to a liquid.

Tags

NGSS.MS-PS1-4

Which property causes water to form droplets?

• mass
• density
• buoyancy
• surface tension

Ben is conducting an investigation to compare the speed at which two insects travel along the ground. Which two tools should he include in his investigation?

• meter stick and stopwatch
• graduated cylinder and balance.
• microscope and ruler
• thermometer and scale

Tags

NGSS.MS-PS3-1

Lily was ready to drive to work. When she reached her car, she saw a flat tire. She made the following statement, " I must have run over a nail." Her explanation is an example of ...

• a prediction.
• a conclusion.
• an inference.
• a hypothesis.

Darla found the mass of seven rock samples. She wants to find the average mass of the rock samples. What steps should Darla use to find the mean?

• Add all the masses, then divide by seven.
• Add the masses, then multiply by seven.
• Arrange the masses from lowest to highest, then find the middle mass.
• Arrange the masses from lowest to highest, then find the total mass.

A characteristic of most conductors

• You can cut them easily
• Positive charges move through them easily
• Negative charges move through them easily
• They are delicous

The property that causes objects to attract each other

• compass
• electric charge
• electric circuit
• electric field

Tags

NGSS.MS-PS2-4