Primary 4 Basic Science and Technology Flashcards: Types, Properties and Uses of Rocks

Question 1

What is a rock?

Accepted Answer

a naturally occurring solid material that makes up part of Earth

Question 2

What are the three main types of rocks?

Accepted Answer

igneous, sedimentary, and metamorphic

Question 3

Igneous rock forms when molten rock ____.

Accepted Answer

cools and hardens

Question 4

Sedimentary rock commonly forms from layers of ____.

Accepted Answer

sediments

Question 5

Metamorphic rock forms when existing rock is changed by ____.

Accepted Answer

heat and pressure

Question 6

Which property describes how shiny a rock is?

Accepted Answer

lustre

Question 7

Which property shows how well a rock resists scratching?

Accepted Answer

hardness

Question 8

Rocks can be grouped by colour, hardness, texture, and ____.

Accepted Answer

lustre

Question 9

Granite is commonly classified as an ____ rock.

Accepted Answer

igneous

Question 10

Marble is commonly classified as a ____ rock.

Accepted Answer

metamorphic

Question 11

Sandstone is commonly classified as a ____ rock.

Accepted Answer

sedimentary

Question 12

Which rock property can be tested by scratching?

Accepted Answer

hardness

Question 13

A rough or smooth surface describes a rock’s ____.

Accepted Answer

texture

Question 14

One important use of hard rocks is ____.

Accepted Answer

building roads and houses

Question 15

Why is limestone useful in industry?

Accepted Answer

it is used to make cement

Question 16

Which is NOT a physical property of a rock: colour, hardness, lustre, or hunger?

Accepted Answer

hunger

Question 17

Zuma Rock is located in ____ State.

Accepted Answer

Niger

Question 18

Olumo Rock is located in ____ State.

Accepted Answer

Ogun

Question 19

The correct way to compare rock samples is to ____.

Accepted Answer

observe the same physical properties in each sample

Question 20

Why may two rocks look different?

Accepted Answer

they contain different materials and formed in different ways

Strong work.