Cell Part Definitions

Question 1

Nucleus

Answer 1

Contains the D.N.A of the organsim and controls the cells activities. Found in both Animal and Plant cells.

Question 2

Cytoplasm

Answer 2

The liquid (mainly water) that makes most of the cell where the chemical reactions occur. Found in both Animal and plant cells.

Question 3

Cell Membrane

Answer 3

A flexible outer layer that surrounds te cell and controls which substances can pass into and out from it.

Question 4

Mitochondria

Answer 4

Tiny parts of cells floating in the cytoplasm where energy is realeased from glucose from food. The mitochondia are where the most respiration occurs. Found in both Animal and Plant cells.

Question 5

Cell Wall

Answer 5

A tough outer layer of the cell, which contains cellulose to provide strength and support the plant as well as keeping the cell rigid. Only found in Plant cells.

Question 6

Vacuole

Answer 6

A space inside the cytoplasm that contains a watery liquid called cell sap. It keeps the cell firm. Only found in Plant cells.

Question 7

Chloroplasts

Answer 7

Structures found in the cells of green parts only (leaves and stems) which contain a green pigment called chlorophyll in which photosynthesis ocuurs. Only found in Plant cells.

Question 8

What is is the rule of reflection

Answer 8

Angle of Incidense = Angle if Reflection

Question 9

How does a pinhole camera work

Answer 9

The light comes in the hole and gives an inverted image of the object

Question 10

how does a periscope work

Answer 10

the top mirror (at a 45 degree angle) reflects light through the periscope onto the bottom mirror (also 45 degrees) into ur eye

Question 11

what makes white light

Answer 11

all the colurs of the spectrum

Question 12

how does a prism work

Answer 12

the white light goes into the prism and the different parts of the white light go at different speeds and seperate.

Question 13

What does mrs gren stand for?

Answer 13

movement, reproduction, sensitivity, growth, respiration, excretion, nutrition

Question 14

Why do objects appear coloured

Answer 14

Say you have white light coming at a red object, the object would appear red, since white light includes red, so all the other colours would be absorbed and red reflected. But if you out green light onto a red object it would appear black, since there is no red in green, so no relfection, only absorbtion.

Question 15

What are the differences of Plant cells compared to Animal cells?

Answer 15

Vacuole
Cell Wall
Chloroplasts