Exam Review

Question 1

The subatomic particle that has a positive charge and a mass of one

Answer 1

Protons

Question 2

The sub atomic particle that has no charge and a mass of one

Answer 2

Neutrons

Question 3

The subatomic particle that has a negative charge and no mass

Answer 3

Electron

Question 4

An _____ is an atom or a molecule that has gained or lost electrons therefore was all came negative or positive charge

Answer 4

Ion

Question 5

In an equation numbers often appear in front of a chemical formula. What do these numbers tell you?

Answer 5

The number of compounds or atoms of each substance in a reaction

Question 6

Conservation of mass : In all chemical reactions, the ____must equal the ______

Answer 6

Mass of products must equal the mass of reactants no atoms are created or destroyed. They are just rearranged.

Question 7

General chemical equation for synthesis

Answer 7

A + B -> AB

Question 8

General chemical equation for decomposition

Answer 8

AB -> A+B

Question 9

General chemical equation for single displacement

Answer 9

A+BC-> AC + B

Question 10

General chemical equation for double displacement

Answer 10

AB + CD -> AD + CB

Question 11

General chemical equation for combustion

Answer 11

CxHy + O2 -> CO2 + H2O

Question 12

General chemical equation for neutralization

Answer 12

Acid + Base -> Salt + Water

Question 13

Why can you sometimes see your image in a lake but other times you cannot

Answer 13

Sometimes you’re able to see your image in a lake because the water is calm and flat and acts as a mirror because all the light rays reflect off the smooth surface as parallel other times you can’t see your image the water is wavy without a flat surface. This causes the light race to disperse in different directions, not creating an image.

Question 14

Explain what refraction is

Answer 14

Light Benz when it passes from one medium into another due to the changes in speed and light

Question 15

What is cell specialization?

Answer 15

The process of a cell becoming a particular type of cell is called cell differentiation. All cells carry the same DNA formation, but they do not perform the same functions and may not look the same.

Question 16

What is a specialized cell?

Answer 16

No When a cell has physical and chemical differences that allows them to perform one job very well

Question 17

Embryonic stem cells

Answer 17

They come from human embryos, and at this point, these cells have not differentiated and can become any type of cell =pluripotent

Question 18

Adult stem cells

Answer 18

They have a limited ability to differentiate. They are able to regenerate all the cell types of the organ where they originate = multipotent

Question 19

Plant organs

Answer 19

Roots- anchor plant in soil, collects nutrients + store food
Leaf- site of photosynthesis
Stem- support transports water plus nutrients through plant
Flower- reproductive structure

Question 20

What are sister chromatids?

Answer 20

Identical copies of a chromosome strand

Question 21

Is epidermal tissue a plant or animal tissue?

Answer 21

Plant tissue

Question 22

Sink

Answer 22

Any process that removes CO2 from the atmosphere eg. forests, oceans

Question 23

Source

Answer 23

Any process that releases CO2 eg. burning fossil fuels

Question 24

List the layers of the atmosphere in order from lowest to highest

Answer 24

Tacos- troposphere: weather the most CO2

Scream- Stratosphere: highest ozone protects from us from us rays

Make- mesosphere: little gas, low pressure

Tummy- thermosphere: x-rays gamma rays r here

Explode-exosphere: space

Question 25

The three spheres in the biosphere

Answer 25

Atmosphere: air Lithosphere; land Hydrosphere: water

Question 26

21. Which of the following is NOT an example of an application of neutralization reactions? A. Taking an antacid to relieve acid reflux B. In neutralizing acidic soil C. To adjust the pH of products D. The corrosion of the soil

Answer 26

d

Question 27

Explain the function of connective tissue

Answer 27

Connective tissue and joint tissues together and strengthens them. It supports and protects other tissues and stores, fat and fills empty space. The three types of connective tissue are such as blood supporting such as bone or cartilage and binding such as tendons and ligaments.

Question 28

Describe the functions of the nervous tissues

Answer 28

Nervous tissues, help by creating and sending messages throughout the body and coordinating its actions. The nervous tissues look at the body surroundings and help to trigger the bodies response, depending on their environment the nervous tissue also relays signals from the brain and spinal cords to the muscles.

Question 29

Explain the functions of the epithelial tissue

Answer 29

It forms a protective barrier by connecting adjoining cell membrane, it lines the body cavities and outer surface of the body. It protects the body from outside sources

Question 30

Epidermal tissue

Answer 30

Protective barrier of the plant, allows water, CO2, O2 to come in and out of the plant

Question 31

Vascular tissue

Answer 31

Transports substances throughout the plant by using the xylem which carries water and minerals (one way up) and plhoem which carries sugars both ways through the plant