6Th Grade- Science Ch. 1

Front 1

Cell membrane

Back 1

Controls the substances that enter and leave the cell.

Front 2

Anton von Leeuwenhoek

Back 2

The first person to see bacteria from his teeth scrapings

Front 3

Magnification

Back 3

The ability to make things look larger than they are.

Front 4

Endoplasmic reticulum

Back 4

Passageways that transport proteins to the cell.

Front 5

Cell wall

Back 5

A strong layer of cellulose that surrounds only plant cells.

Front 6

Resolution

Back 6

The ability to clearly distinguish the parts of an object.

Front 7

Ribosomes

Back 7

These organelles produce proteins.

Front 8

Mitochondria

Back 8

These organelles produce energy for the cell.

Front 9

Golgi bodies

Back 9

These organelles receives proteins and package them for delivery to the cell.

Front 10

Nucleus

Back 10

The "brain" of the cell.

Front 11

Cytoplasm

Back 11

Gel-like substance between the nucleus and cell membrane.

Front 12

Chloroplasts

Back 12

Traps the suns energy to produce food for the cell.

Front 13

Vacuole

Back 13

Part of the cell that stores food, water, and wastes.

Front 14

Lipids

Back 14

Fats, waxes and oils

Front 15

DNA

Back 15

This is shaped like a twisted ladder.

Front 16

Diffusion

Back 16

The process by which molecules move from an area of higher to lower concentration (spraying perfume in a room and later smelling it and all parts of the room).

Front 17

Selectively permeable

Back 17

A cell membrane is this. It means that some substances can pass through but others cannot.

Front 18

Osmosis

Back 18

The diffusion of water molecules through a membrane from a higher to lower concentration.

Front 19

Genes

Back 19

Located on the chromosomes, these sections of DNA determine an organism's characteristics and control its development and growth.

Front 20

Chromosomes

Back 20

These contain the genes. I human has 23 pairs.

Front 21

Two reasons why it's important for a cell membrane to be selectively permeable?

Back 21

1. It lets things in. (Oxygen, carbon dioxide, water, nutrients) 2. It keeps things out. (Salt, large molecules).

Front 22

What does a cell membrane let in?

Back 22

Oxygen, carbon dioxide, water, nutrients.

Front 23

What does a cell membrane keep out?

Back 23

Salt, large molecules.

Front 24

List three ways a plant cell and an animal cells are similar.

Back 24

They both have a cell membrane, cytoplasm, and a vacuole.

Front 25

List three ways a plant cell and an animal cell are different.

Back 25

Only plant cells have a cell wall, chloroplasts, and chlorophyll.