7.6a

All of these are example of a physical change EXCEPT .....

• Melting butter

• Flattening a piece of metal

• Cutting paper

• Tarnishing silver vase

Which of the following is a chemical property associated with wood?

• The ability to burn

• Snapping when bent

• Floating on water

• Having a rough surface

Which of the following is the BEST evidence that rusting is a chemical property rather than a physical property of iron?

• Rust forms slowly

• Rust can form on any material made of iron

• Rust cannot be turned back into iron

• Rust does not look the same as iron.

Tags

NGSS.MS-PS1-2

Students collect rock samples on a field trip and test them for different properties. Which of the following is a chemical property of a rocks?

• Having a white color

• Reacting when test with a drop of acid

• Having a rough surface

• Being easy to scratch with a piece of metal.

Tags

NGSS.MS-PS1-2

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Form a hypothesis

Conduct experiment

Ask a question

Communicate results

Draw conclusions

Tags

NGSS.MS-LS1-5

Students are give a sample of an unknown material. They want to perform tests to determine it identity. Which test is MOST likely to change the sample into a new substance?

• Dissolving it in water

• Heating it until it melts

• Grinding it into a powder

• Burning it in a flame

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What organizes all discovered chemical elements in rows and columns according to increasing atomic number?

• Periodic Table of Elements

• Coefficient

• Chemical formula

• Chemical symbol

What is the smallest particle of an element?

• Molecule

• Atom

• Compound

• Mixture

What is composed of two or more different elements that are chemically combined?

• Element

• Mixture

• Compound

• Solution

Tags

NGSS.MS-PS1-5

What is a pure substance composed of the same type of atom throughout?

• Compound

• Molecule

• Mixture

• Element