Unit A: Section 3.0 Flashcards Preview

Grade 8: Science > Unit A: Section 3.0 > Flashcards

Flashcards in Unit A: Section 3.0 Deck (14):
1

What affects a flow rate?

How thick or thin it is and the viscosity

2

What determines the viscosity of a substance?

The internal resistance or friction between the particles

3

What factor has an affect on viscosity?

Temperature

4

How can viscosity be measured?

Using the ramp test

5

What is density?

The amount of matter in a given volume

6

What density of a substance depend on?

It depends on the particles of a substance and wether it is a solid liquid or gas

7

What is the formula for density?

Density (d) = mass (m) / volume (v)

8

Why can ships float?

Because they contain a large quantity of air and the average density of everything is lighter than the density of water

9

Density does not change?

Density does not change as long as the temperature stays the sane

10

If you hear up substance the density changes because?

As energy is added the particles move quickly and farther apart, thus increasing the volume. The density increases because mass remains constant but the volume increases

11

What is buoyancy?

It is the tend act of a substance to float

12

Why do buoyant objects float?

They take up space in a fluid, pushing some of it away of displacing it causing them to float, because the fluid pushes back against the force of gravity

13

What is the buoyant force?

The buoyant force pushes objects upward

14

What is a flow rate?

How quickly a fluid can flow