Grade 3 Science Worksheet: Forces - Push and Pull

Problem Analysis:

The worksheet is focused on understanding forces, specifically "push" and "pull," and how they move objects. The tasks involve identifying and applying these concepts in various scenarios.

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Solution:

#### 1. What must be applied to push or to pull an object?
- Answer: A force must be applied to push or pull an object.
- Explanation: Forces are what cause objects to move or change their motion. Pushing and pulling are types of forces that act on objects to make them move away from or towards the source of the force.

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#### 2. A ________ moves things away from you.
- Answer: Push
- Explanation: A push is a force that moves objects away from the person or source applying the force.

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#### 3. A ________ moves things towards you.
- Answer: Pull
- Explanation: A pull is a force that moves objects towards the person or source applying the force.

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#### 4. Name an object you can twist.
- Answer: A door handle, a bottle cap, a screwdriver, etc.
- Explanation: Twisting involves rotating an object around its axis. Common examples include turning a doorknob, opening a bottle cap, or using a screwdriver.

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#### 5. Label the following pictures with push, pull, or both.

- First Picture (Baseball Player Hitting a Ball):
- Label: Push
- Explanation: The player is hitting the ball, which means they are applying a force to move the ball away from them. This is a push.

- Second Picture (Person Opening a Door):
- Label: Pull
- Explanation: The person is pulling the door open, moving it towards themselves. This is a pull.

- Third Picture (Person Pulling a Donkey):
- Label: Pull
- Explanation: The person is pulling the donkey by holding onto a rope or harness, moving the donkey towards themselves. This is a pull.

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#### 6. Explain why you think both forces are used in the picture above.
- Answer: In the context of the entire worksheet, the question likely refers to the idea that both push and pull forces are common in everyday activities. For example:
- When playing baseball, the player pushes the ball with the bat, but the pitcher pulls the ball back before throwing it.
- Opening a door involves pulling it open, but closing it might involve pushing it shut.
- Pulling a donkey requires a pull force, but if the donkey were to push back, it would involve a push force as well.

Therefore, both push and pull forces are often used together in real-life scenarios, even if only one is explicitly shown in each individual picture.

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Final Answer:

1. Force
2. Push
3. Pull
4. Door handle, bottle cap, screwdriver, etc.
5.
- First Picture: Push
- Second Picture: Pull
- Third Picture: Pull
6. Both forces are used because many activities involve both pushing and pulling in different contexts. For example, opening a door involves pulling, while closing it involves pushing. Similarly, hitting a ball is a push, but preparing to hit it might involve pulling back the bat.

Boxed Final Answer:
\boxed{
\begin{aligned}
1. & \text{ Force} \\
2. & \text{ Push} \\
3. & \text{ Pull} \\
4. & \text{ Door handle, bottle cap, screwdriver, etc.} \\
5. & \text{ First Picture: Push, Second Picture: Pull, Third Picture: Pull} \\
6. & \text{ Both forces are used because many activities involve both pushing and pulling in different contexts.}
\end{aligned}
}