Science chemistry test ap

Question 1

Is molasses viscous

Answer 1

True

Question 2

What is hardness?

Answer 2

A minerals ability to resist being scratched

Question 3

Steel has low hardness

Answer 3

False

Question 4

Solubility is a chemical property

Answer 4

False

Question 5

Which container has a higher density (the balls are farther apart or closer together (solid and liquid))

Answer 5

The solid one

Question 6

What is the most conductive

Answer 6

Copper wire

Question 7

What are physical properties

Answer 7

Properties that are used to observe and describe matter

Question 8

Reactive to air is a chemical property

Answer 8

True

Question 9

Malleable

Answer 9

Pliable, can be bent

Question 10

What is the most ductile?

Answer 10

Metals

Question 11

Lustre

Answer 11

Is the shininess of an object

Question 12

Viscosity

Answer 12

Is how the liquid flows (they used an ex of how the lava flows)

Question 13

Digestion is a chemical change

Answer 13

True

Question 14

Melting chocolate

Answer 14

Reversible

Question 15

Glaciers melting

Answer 15

Heat added - physical change

Question 16

What is a physical change?

Answer 16

A change in which the chemical composition does not change . It would be building and breaking, dissolving, and change of state

Question 17

What is chemical change?

Answer 17

Ability of a substance to change into a new substance. Evidence of a chemical change us colour, odour, heat or light formed, gas firmed (bubbles), precipitate (L+L=S), new substance

Question 18

how do you calculate percent error

Answer 18

percent error= predicted value - actual value divided by actual value x100

Question 19

formulas (density, mass, volume)

Answer 19

D= m\v
M=vxd
V=m/d

Question 20

chemical properties

Answer 20

~ describes the ability of a substance rot change into a new substance or substances
~Include how a substance reacts with other substances (ex: acids or water) or how it reacts to heat or light
~chemical properties can only be observed when a chemical change occurs

Question 21

chemical properties include

Answer 21

~ absorbs heat in a reaction
~Combustible - reacts rapidly with oxygen to produce heat and light
~forms gas when heated
~reacts with acid
~reacts with water
~emits heat during reaction
~emits light during a reaction
~forms a precipitate (solid) in a solution