Study Guide for Chemistry Benchmark/Chemistry Unit Test

A substance is tested with electrodes and a light bulb (it does not conduct electricity) does not light up. It burns readily in the presence of oxygen (is flammable). Which substance is represented?

• 120°C, 3.97 g/mL, Yes, Yes, No

• 800°C, .992g/mL, Yes, No, Yes

• 277°C, 1.32 g/mL, No, No, No

• 68 degrees C, 3.67g, no, no, yes

• 0°C, 1.00 g/mL, Yes, No, No

Tags

NGSS.MS-PS1-2

This substance has the highest density and generates a magnetic field (its magnetic) when tested. Which substance is represented?

• 120°C, 3.97 g/mL, Yes, Yes, No

• 800°C, .992 g/mL, Yes, No, Yes

• 227°C, 1.32 g/mL, No, No, No

• 68 degrees C, 3.67g/mL, No,No,Yes

• 0°C, 1.00 g/mL, Yes, No, No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-3

Which is a chemical property of matter? Look at the choices below!

• flammable

• opaque

• malleable

• conductive

You are given an unknown substance to identify. After making careful observations, you determine that the substance is brittle (breaks easily), dull in appearance, and does not conduct heat or electricity. Based on your observations, which of the following most likely describes the unknown substance?

• Metal

• Non-metal

• Metalloid

• Alloy

What type of change is represented in the photo below? Physical or chemical?

• Physical

• Chemical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A bicycle is left outside in the rain. The chain becomes rusty. What type of change is represented? Is it a chemical or physical change?

• Chemical change

• Physical change

Tags

NGSS.MS-PS1-2

Wood is burned and turns to ashes and gases. What type of change is represented?

• Chemical

• Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A gold ring is melted down and turned into a pendant for a necklace (it is still gold right). What type of change is represented? Chemical or physical?

• Chemical

• Physical

Tags

NGSS.MS-PS1-4

11. Why is sugar water classified as a homogeneous mixture?

• it is the same throughout and dissolves completely so you cannot see the different parts

• it contains two elements

• Because it is a pure substance

• it is not the same throughout, you can distinguish the parts

What type of matter is sodium chloride (salt)? (NaCl)

• Homogeneous mixture

• Heterogeneous mixture

• element

• compound