Science Lesson 2

Question 1

Formula for Water

Answer 1

H20

Question 2

H

Answer 2

Hydrogen

Question 3

O

Answer 3

Oxygen

Question 4

What does the word part a- stand for

Answer 4

not

Question 5

what does the word part tom stand for

Answer 5

to cut

Question 6

Atom

Answer 6

smallest unit of an element that maintains the properties of that element

Question 7

The matter that you encounter every day, both living and nonliving, is made up of basic particles called _________.

Answer 7

Atoms

Question 8

Different types of atoms are known as ____________.

Answer 8

Elements

Question 9

Which element makes up most of the human body?

Answer 9

Oxygen

Question 10

molecule

Answer 10

a group of atoms that are held together by chemical bonds

Question 11

a substance made up of two or more elements joined by chemical bonds

Answer 11

compound

Question 12

Are all molecules made up of the same atoms?

Answer 12

No some are made of the same atoms and some are made of different once (eg compound)

Question 13

What are some examples of nutrients?

Answer 13

lipids, proteins and carbogydrates

Question 14

lipid

Answer 14

Fat molecule that has similar properties

Question 15

Do lipids mix with water?

Answer 15

No

Question 16

What do lipids do?

Answer 16

store energy

Question 17

Protien

Answer 17

molecule made up of smaller molecules called amino acids

Question 18

What are amino acids used for?

Answer 18

To make new proteins

Question 19

What are proteins used for?

Answer 19

to build and repair body structures and to regulate body processes

Question 20

Enzymes

Answer 20

Proteins that help chemical processes happen in cells.

Question 21

Carbohydrates

Answer 21

molecules that include sugars, starches, and fiber.

Question 22

What are carbohydrates used for?

Answer 22

a source of energy and for energy storage

cells break down carbohydrates to release energy stored in them

Question 23

Nucleic acid

Answer 23

molecule that carries information in cells

Question 24

Nucleic acids are made up of smaller molecules called ________________.

Answer 24

nucleotides

Question 25

What is one example of a type of nucleic acid found in all cells?

Answer 25

Deoxyribonucleic acid (DNA)

Question 26

A lipid that contains phosphorus is called _________

Answer 26

phospholipid

Question 27

What forms much of the cell membrane?

Answer 27

Phospholipids

Question 28

Describe the phospholipid layers.

Answer 28

The head of the phospholipid molecules attract water and the tails repel water. The heads line up to face the outside of the cell and another layer of heads line up to face the inside.

Question 29

Water moves through the cell membrane by a process called _____________?

Answer 29

osmosis

Question 30

How does water move using osmosis?

Answer 30

Moves from high concentration to low concentration.

Question 31

A cell membrane is made of phospholipid atoms/molecules?

Answer 31

molecules

Question 32

The tail of the phospholipid is made up of carbon and hydrogen atoms/molecules?

Answer 32

atoms

Question 33

A(n) _____________________ is a group of atoms joined by chemical bonds.

Answer 33

molecule

Question 34

What is the difference between atoms and molecules?

Answer 34

molecules are groups of atoms

Question 35

Name four important types of molecules found in cells.

Answer 35

lipid
protein
carbohydrates
nucleic acid

Question 36

Why is water important for life?

Answer 36

It makes up nearly 2/3 of mass of the cell.

Question 37

How are atoms and molecules important to cell processes?

Answer 37

molecules make up the cell membranes, atoms join to make water molecules