Science (8th)

Question 1

what is a homogeneous mixture?

Answer 1

Look the same throughout and connot be easily seperated.

Question 2

what is a heterogeneous mixture?

Answer 2

Large particles that can be easily seen/separated throughout

Question 3

what is a solution

Answer 3

homogeneous mixture of solvent and 1 or more solutes; looks the same throughout.

Question 4

What’s a colloid?

Answer 4

heterogeneous mixture containing small, undissolved particles that don’t settle out/separate(very small particles, but scatter light)

Question 5

3 ways to separate a homogeneous mixture

Answer 5

filtration, hot plate(distillation), and evaporation

Question 6

what are 2 ways to separate a heterogeneous mixture

Answer 6

magnet and filtration

Question 7

What is found the smallest in the solution?

Answer 7

solute

Question 8

What does solute dissolve in and has the largest amount.

Answer 8

solvent

Question 9

How does solutes affect solutions in boiling points?

Answer 9

Raises boiling point.

Question 10

How does solutes affect solutions in the freezing point

Answer 10

lowers the freezing point.

Question 11

How does solutes affect solutions in the concentration?

Answer 11

More solute=stronger
Less solute=less dilute

Question 12

what’s an example of a solution?

Answer 12

Kool-Aid, saltwater, apple juice.

Question 13

What’s an example of a colloid

Answer 13

milk, fog, shaving cream

Question 14

what’s an example of a suspension?

Answer 14

oil+vineger, salad dressing, and muddy water.

Question 15

What 3 things affect solubility?

Answer 15

temp, pressure, property’s of solute a solvent.

Question 16

what are lost, gained, or shared when a chemical bond is created?

Answer 16

valence electrons

Question 17

what happens to the bonds between atoms when a chemical change occurs.

Answer 17

bonds break and new bonds form because atoms of elements are rearranged.

Question 18

what are 5 factors that effect the rate of chemical changes?

Answer 18

surface area, temp, concentration, catalyst, inhibitor

Question 19

law of conservation mass is a closed or open system?

Answer 19

closed

Question 20

What is the only thing you can change to balance an equation?

Answer 20

coefficients

Question 21

what can you never change balancing chemical equations?

Answer 21

Subscript

Question 22

what are synthetic materials?

Answer 22

chemicals made by humans