RETEST: District Benchmark

Front

What is an unbalanced force?

Back

An unbalanced force is a net force acting on an object that causes it to accelerate, change direction, or change its state of motion.

Front

List examples of situations that experience unbalanced forces.

Back

Examples include: a can rolling down a ramp, a swing moving back and forth, and a bird landing on a branch.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of the reactants equals the total mass of the products.

Front

If a student mixes 10 g of water and washing soda with 15 g of water and epsom salts, what is the expected weight of the products?

Back

The expected weight of the products is 25 g, according to the law of conservation of mass.

Front

What does the formula 4CF2Cl2 represent in terms of chemical composition?

Back

The formula 4CF2Cl2 indicates that there are 4 carbon (C) atoms, 8 fluorine (F) atoms, and 2 chlorine (Cl) atoms in the compound.

Front

What is the significance of a constant speed in motion?

Back

Constant speed means that an object is moving at the same rate over time, indicating that the forces acting on it are balanced.

Front

What happens to an object at rest when an unbalanced force acts on it?

Back

An object at rest will start to move in the direction of the unbalanced force applied to it.

Front

How can you identify if forces are balanced or unbalanced in a situation?

Back

If the net force acting on an object is zero, the forces are balanced; if the net force is not zero, the forces are unbalanced.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the motion of an object, often causing it to slow down or stop.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.