Choose the correct answer for each question: Which contact force can cause a moving object to slow down? A) Friction force B) Gravitational force C) Magnetic force Force has size and direction. Force

Here are the answers to your questions:

1. The following contact forces can cause a moving object to slow down:

• A) Friction force is a contact force that opposes motion, causing objects to slow down.
• B) Gravitational force is a non-contact force.
• C) Magnetic force is a non-contact force. Therefore, only friction force fits the description of a contact force that slows down a moving object.

The correct option is A.

$$\boxed{\text{A}}$$

2. Force has size and direction. Force can do the following, except—

• A) Force can initiate motion (move objects).
• B) Force can change an object's speed and/or direction (cause acceleration).
• C) Force can stop moving objects (cause deceleration). All options A, B, and C describe actions that force can perform. Therefore, none of them are exceptions.

The correct option is D.

$$\boxed{\text{D}}$$

3. These are true about soil, except:

• A) Soil is often classified into types like sandy, loam, and clay based on particle size and composition. This statement is generally true.
• B) Soil is indeed a complex mixture of mineral particles (stones, gravels, sand, clay), organic matter (humus), air, and water. This statement is true.
• C) Humus is decomposed organic matter from dead plants and animals, not just a "tiny bit of dead plants and animals." It is a stable, dark material that significantly contributes to soil fertility. This statement is inaccurate because it mischaracterizes humus as simply "dead plants and animals" and implies it's a "tiny bit."
• D) Plants and animals rely on soil for nutrients, water, and habitat. This statement is true.

The statement that is not true about soil is C.

The correct option is C.

$$\boxed{\text{C}}$$