What did Thomson discover?

• electron
• proton
• neutron
• electron cloud

John Dalton stated:

• Atoms are tiny, invisible particles.

• Atoms of one element are all the same.

• Atoms of different elements are different.

• Compounds form by combining atoms.

• All of the statements listed.

Tags

NGSS.MS-PS1-1

What is the factor that an experimenter changes on purpose?

• Dependent Variable
• Independent Variable
• Constant
• Control

The type of variable that responds to the experiment and is what you measure or count to determine if your hypothesis is true.

• Independent
• Dependent
• Control

Tags

NGSS.MS-PS3-4

How many variables should you change in an experiment?

• none
• only 1

• 2 or more
• depends on the type of experiment

How many significant figures: 153.0 mL

• 1
• 2
• 3
• 4

How many significant figures: 1000 mL

• 1
• 2
• 3
• 4

What do you call a bonded group of atoms/singular atom that carry either a positive or negative charge?

• electron

• ion

• neon

• atom

Tags

NGSS.MS-PS2-3

Which state of matter can be compressed easily?

• Solid

• Liquid

• Gas

• All of them

Which temperature scale cannot have negative numbers

• Fahrenheit

• Celsius

• Kelvin

• Degrees