Pma Science

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

ability to allow heat to flow 

• Viscosity
• Conductivity
• Density
• Melting/Boiling Point

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Julie is colleting information about the physical properties of a rock. She puts water in a graduated cylinder. Then she puts the rock into the cylinder. What information can Julie collect from the graduated cylinder?

• the rocks mass
• the rocks temperature
• the rocks texture
• the rocks volume

Mass, relative density, solubility, color, texture, state of matter, conductivity, etc.

• Physical state
• Insulators
• Physical Properties 
• Inferences

Tags

NGSS.MS-PS1-2

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Tags

NGSS.MS-PS2-2

Calculate the density of the cube.

• 2 g/cm³
• 4 g/cm³
• 6 g/cm³
• 8 g/cm³

A student asked, "Which brand of battery lasts the longest?" What statement is the best hypothesis for this experiment?

• If my toy train is left turned on, then it will run out of battery life.

• If my toy train set is plugged into the wall, then the batteries will not be used.

• If I change the batteries in my toy train set every week, then it will not run out of power.

• If I use the Power Up battery in my toy train, then it will last longer than other batteries.

Tags

NGSS.MS-ETS1-3

For scientific data to be considered accurate and reliable, most science experiments should be

• Conducted as many times as possible

• Conducted 3 times

• Conducted only 1 time

• Repeated no more than 2 times

Mr. Hewitt found an object that is bendable, conducts heat and electricity, and has a metallic luster. The object is most likely a ________.

• metal

• nonmetal

• metalloid

• gas

Which of the following statements about models is true?

• Scientists use models to understand how systems work.

• If an inaccurate scale model is used to create a structure, the actual structure will likely have problems.

• A diagram is one example of a scientific model.

• All of these statements are true.

Tags

NGSS.MS-ETS1-4

NGSS.MS-LS2-3