Warm-Ups Day 2 : 1.1

Convert 5 kilometers to meters.

• 50 meters

• 500 meters

• 5000 meters

• 50000 meters

Answer explanation

To convert kilometers to meters, multiply by 1000. Therefore, 5 kilometers is 5 x 1000 = 5000 meters. The correct answer is 5000 meters.

Which of the following is a chemical property of matter?

• Melting point

• Density

• Flammability

• Color

Answer explanation

Flammability is a chemical property because it describes how a substance reacts with fire, indicating a change in its chemical composition. In contrast, melting point, density, and color are physical properties.

Identify the state of matter for water at 0°C.

• Solid

• Liquid

• Gas

• Plasma

Answer explanation

At 0°C, water freezes and becomes ice, which is its solid state. Therefore, the correct answer is Solid.

Convert 1500 millimeters to meters.

• 0.15 meters

• 1.5 meters

• 15 meters

• 150 meters

Answer explanation

To convert millimeters to meters, divide by 1000. Thus, 1500 mm ÷ 1000 = 1.5 meters. Therefore, the correct answer is 1.5 meters.

Which of the following is a physical property of matter?

• Reactivity with acid

• Combustibility

• Boiling point

• Ability to rust

Answer explanation

The boiling point is a physical property of matter, indicating the temperature at which a substance changes from liquid to gas. In contrast, reactivity with acid, combustibility, and the ability to rust are chemical properties.

Convert 3.5 meters to centimeters.

• 35 centimeters

• 350 centimeters

• 3500 centimeters

• 0.35 centimeters

Answer explanation

To convert meters to centimeters, multiply by 100. Thus, 3.5 meters x 100 = 350 centimeters. Therefore, the correct answer is 350 centimeters.

Which state of matter has a definite volume but no definite shape?

• Solid

• Liquid

• Gas

• Plasma

Answer explanation

A liquid has a definite volume, meaning it occupies a specific amount of space, but it does not have a definite shape, as it takes the shape of its container. This distinguishes it from solids, which have both definite volume and shape.

Convert 0.02 kilometers to centimeters.

• 2 centimeters

• 20 centimeters

• 200 centimeters

• 2000 centimeters

Answer explanation

To convert kilometers to centimeters, multiply by 100,000. Thus, 0.02 km x 100,000 = 2000 cm. Therefore, the correct answer is 2000 centimeters.

Which of the following is an example of a chemical change?

• Ice melting

• Sugar dissolving in water

• Iron rusting

• Water boiling

Answer explanation

Iron rusting is a chemical change because it involves a reaction between iron and oxygen, forming iron oxide. In contrast, melting ice, dissolving sugar, and boiling water are physical changes, not altering the substances' chemical identities.

Convert 250 centimeters to meters.

• 0.25 meters

• 2.5 meters

• 25 meters

• 2500 meters

Answer explanation

To convert centimeters to meters, divide by 100. Thus, 250 cm ÷ 100 = 2.5 meters. Therefore, the correct answer is 2.5 meters.