Chemistry CBA #1 Review 2019-2020

Write 7.8 x 10^-3  in standard form.

• 0.0078
• 7,800
• 78
• 0.078

Tags

CCSS.8.EE.A.3

Change from standard form to scientific notation: 12,000,000

• 12.0  x  10⁷
• 0.12  x  10⁷
• 1.2  x  10⁶
• 1.2  x  10⁷

Which of the following best describes a chemical mixture?

• A compound made from different elements

• A substance made through chemical bonding

• When two substances are combined but are not chemically bonded

• All of the above

What type of mixture is this?

• heterogeneous 
• homogeneous

What type of mixture is this?

• heterogeneous 
• homogeneous

Elements and compounds are always ___.

• pure
• mixed

Tags

NGSS.MS-PS1-1

Which of the following is an example of a homogenous mixture?

• Salt water

• Blood

• Air

• All of the above

Which two of the following are types of mixtures? (Select 2)

• Heterogenous

• Element

• Homogenous

• Compound

Which two of the following are pure substances? (Select 2)

• Heterogenous

• Homogenous

• Element

• Compound

What are the three states of matter?

• electron, proton, neutron

• oxygen, hydrogen, nitrogen

• earth, wind, fire

• solid, liquid, gas