8th Grade Science -MCAS Review

If an object has more _______, it will have more gravitational force.

• mass

• distance

• volume

• speed

Tags

NGSS.MS-PS2-4

What makes mass and weight different?

• Mass is the amount of matter meanwhile weight is expressed in kg, lbs. and g.

• Mass and weight are expressed in g, kg and lbs.

• Mass is the amount of matter meanwhile weight is the force of gravity on an object's mass.

• none of the choices

As mass increases, what happens to gravitational force?

• increases
• decreases
• stays the same
• i don't know

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

How many elements are represented in the compound?
Na₂CO₃

• 1

• 2

• 3

• 4

Answer explanation

Remember each element's symbol starts with a CAPITAL letter. He, Fe, or Ca.

Tags

NGSS.MS-PS1-1

Element, mixture, or compound?

• element

• mixture

• compound

Tags

NGSS.MS-PS1-1

Element, mixture, or compound?

• element

• mixture

• compound

Answer explanation

Notice you have 2 atoms of the SAME element bonded together. Because it it the SAME atom bonded, it is classified as an element

Tags

NGSS.MS-PS1-1

What do you see in this picture?

• A pure element

• A pure compound

• A mixture of two elements

• A mixture of two compounds

• A mixture of an element and a compound

Answer explanation

Remember....

Mixtures are a combination of two or more substances not chemically combined.

Compounds are two or more different elements chemically bonded.

An element is made up of a single type of atom - it can be a single atom or two or more atoms of the same element bonded together.

Tags

NGSS.MS-PS1-1

What do you see in this picture?

• A pure element

• A pure compound

• A mixture of two elements

• A mixture of two compounds

• A mixture of an element and a compound

Tags

NGSS.MS-PS1-1

Matter is best described as anything that has _________________

• mass

• mass and velocity

• mass and takes up space

• mass, density and exerts pressure

What kind of substance is composed of two or more DIFFERENT elements that are chemically combined?

• element

• mixture

• solution

• compound

Answer explanation

Look carefully - this is TWO or more DIFFERENT atoms chemically bonded together

Tags

NGSS.MS-PS1-1