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

NGSS.MS-PS1-5

ability to allow heat to flow 

• Viscosity
• Conductivity
• Density
• Melting/Boiling Point

Tags

NGSS.MS-PS3-3

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

Tags

NGSS.MS-PS1-2

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

• Physical state
• Insulators
• Physical Properties 
• Inferences

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

• dependent variable
• independent variable
• data
• control group

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.

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