Free Printable Grade 8

1.

EASY QUESTION

A lightbulb in a 120 V circuit is switched on, and a current of 0.50 A flows through the filament. What is the resistance of the bulb?

a)

A. 140

b)

B. 240

c)

C. 114

d)

D. 214

2.

EASY QUESTION

Which of the following is a conductor?

a)

A. Rubber

b)

B. Glass

c)

C. Plastic

d)

D. Metal

3.

EASY QUESTION

What is the GCF of the following expression? 8x³y² - 12x²y³

a)

A. 4x³y²

b)

B. 2x²y²

c)

C. 4x²y²

d)

D. 8x⁵y⁵

4.

EASY QUESTION

Find the Product $\frac{3x+4}{x-3}\circ\ \frac{2x-3}{3x+4}$

a)

A. $\frac{2x+3}{x-3}$

b)

B. $\frac{2x-3}{x-3}$

c)

C. $\frac{2x-3}{x+3}$

d)

D. $\frac{2x+3}{x+3}$

5.

EASY QUESTION

What is the GCF of: 6m³n² - 9m²n³ + 12m⁴n

a)

A. 3m²n

b)

B. 6m³n³

c)

C. 3m²n³

d)

D. 12m⁴n

6.

AVERAGE QUESTION

Factor the difference of two squares expression: 16a⁶ - 25b⁴

a)

A. (4a³ + 5b²) (4a³ - 5b²)

b)

B. (16a³ + 25b²) (16a³ - 25b²)

c)

C. (4a³ + 5b²)(4a³ + 5b²)

d)

D. (16a³ - 25b²)(16a³ + 25b²)

7.

AVERAGE QUESTION

Factor the expression as the difference of two cubes: 27u⁹ - 1

a)

A. (3u³ - 1)(9u⁶ + 3u³ + 1)

b)

B. (3u³ - 1)(9u⁶ - 3u³ + 1)

c)

C. (3u⁶ - 1)(9u³ + 3u³ + 1)

d)

D. (3u³ - 1)(9u⁶ + 3u³ - 1)

8.

AVERAGE QUESTION

Which is a false statement on Ohm’s law?

a)

A. The unit of resistance is ohm.

b)

B. Voltage is current multiplied to resistance.

c)

C. High resistance means less current.

d)

D. Power is voltage times resistance

9.

HARD QUESTION

Electrons are held by the force of electrical attraction at a typical distance of $1\ \times10^{-10}$ m from proton on nucleus. What is the force of electrical attraction between an electron and proton?

a)

A. $1.30\times10^8N$

b)

B. $2.30\ x10^{-7}\ N$

c)

C. $2.30\ \times10^{-8}N$

d)

D. $1.30\times10^7\ N$

Grade 8

Total questions: 9

Worksheet time: 19mins

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