Sect-1;Science Skills

Question 0

How do you measure mass?

Answer 0

grams.

Question 1

How do you measure length?

Answer 1

meters

Question 2

How do you measure volume?

Answer 2

cm3 or Liter

Question 3

How do you measure pH?

Answer 3

1-14 on pH scales

Question 4

Explain how to calculate the magnification of a microscope

Answer 4

multiply objective lens by ocular lens

Question 5

define hypothesis

Answer 5

an educated guess based on previously know data, must include words “if” and “then”

Question 6

describe how an “e” is viewed through a microscope if it is placed right side up on the slide

Answer 6

upside down and backwards

Question 7

how does pH affect the rate of enzyme reaction?

Answer 7

too acidic or too basic can affect the way an enzyme works. It can denature the enzyme.

Question 8

how does temperature affect the rate of enzyme action?

Answer 8

too hot or too cold can denature the enzyme

Question 9

how can the amount of substrate affect the rate of enzyme action?

Answer 9

enzyme action speeds up to a certain point and then levels out because it can’t work any faster.

Question 10

explain the relationship between an enzyme and its substrate

Answer 10

the enzyme shape is specific to the substrate that the enzyme works on/with. the enzyme will fit with the substrate like a lock and key or ball and glove. it will break the substrate down and the enzyme will be left undamaged.

Question 11

define diffusion

Answer 11

the movement of a substance from an area of high concentration to an area of low concentration.

Question 12

diffusion

Answer 12

the movement of particles from an area of high concentration to an area of low concentration

Question 13

define osmosis

Answer 13

the movement of water from an area of high concentration to an area of low concentration.

Question 14

define facilitated diffision

Answer 14

the movement of large particles from high concentration to low concentration through a protein channel.

Question 15

isotonic

Answer 15

water entering cell equals water leaving cell.

Question 16

hypertonic

Answer 16

more water leaves the cell than enters it

Question 17

hypotonic

Answer 17

more water enters the cell than leaves it

Question 18

characteristics of active transport

Answer 18

the movement of a substance from low concentration to high concentration which requires energy.

Question 19

characteristics of passive transport

Answer 19

the movement of a substance from high to low concentration which doesn’t require energy.

Question 20

why are carrier proteins important to active transport?

Answer 20

they are needed to help the material to move in or out of the cell. these are materials that are too large to travel using the cell membrane. endocytosis and exocytosis are examples of this.