FINAL TEST IN SCIENCE 8

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“Newton’s first law of motion states that an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This is also known as the law of inertia.

1. How long will an object remain at rest, according to Newton’s First Law of Motion?

• It can’t rest
• Until noon
• Until an unbalanced force occurs
• As long as there are unbalanced forces acting on it.

Inertia is the natural tendency of an object to resists any changes of its motion”. “Inertia depends on the mass of an object. The greater the mass, the greater its inertia”.

2. Which of the following characteristics describes inertia?

• A natural tendency of an object
• A type of force
• The speed of an object
• None of the above

3. A book is at rest on top of a table. According to Newton’s first law of motion, what can you say about the forces acting on the book?

• The forces acting on the book are net external forces.
• The forces acting on the book are imbalanced.
• The forces acting on the book are gravity and air resistance.
• The forces acting on the book are balanced.

“Newton’s first law of motion states that an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This is also known as the law of inertia.

4. Newton’s First Law of motion is also called as

• Law of Acceleration
• Law of Inertia
• Law of Interaction
• Law of Gravitation

5. A and B are two objects with masses 100 kg and 75 kg respectively. Which of the following statements is true about the inertia of A and B?

• Both will have the same inertia
• B will have more inertia
• A will have more inertia
• Both will have less inertia

6. Which of the following objects has the greatest inertia?

• A 10-year old boy jogging.
• A bicycle on the sidewalk.
• A 10-wheeler truck on a parking lot.
• A dog inside it's doghouse

          An earthquake is the shaking of the ground caused by the movement of two blocks of Earth's crust  along a fault. When a fault suddenly moves, an earthquake occurs.

7. Which of the following refers to the shaking of the ground produced when blocks of Earth’s crust move?

• Earthquake
• Tsunami
• Typhoon
• fault

         When a fault suddenly moves, an earthquake occurs. A fault is a break in the Earth's crust and an area or boundary where these plates meet.

8. Which of the following describes a fault?

• A disturbance in the Earth’s crust.
• A break in the Earth’s crust.
• An origin of an earthquake.
• An effect or damage that can be seen in the earth’s crust.