Explanation

A compound machine is a machine that is made up of two or more simple machines.

A bicycle, a crane, wheel borrow and scissors are examples of compound machines because they are made up of multiple simple machines, such as:

• Wheels and axles (simple machine: wheel)
• Pedals and levers (simple machine: lever)
• Gears and pulleys (simple machine: pulley)
• Inclined planes (simple machine: inclined plane)

Explanation

• The Fahrenheit scale has 180 divisions between the freezing point (32°F) and the boiling point (212°F) of water.
• This means that each degree Fahrenheit represents a temperature change of 1/180 of the range between the freezing and boiling points of water.

Explanation

The properties used to describe heat are:

• Hot (high temperature)
• Energy (thermal energy)
• Cold (low temperature)

Explanation

1 kilometre (km) = 1000 metres (m)

So 0.05 km = 0.05 x 1000 m = 50 m.

Explanation

1 kg = 1000 g

So 4 kg = 4 x 1000 g = 4000 g.

Explanation

Blood has a pH level of around 7.3, which is closest to neutral (pH 7).

Explanation

 In a neutralization reaction, an acid reacts with base to produce a salt and H2O.

Explanation

Minerals are essential nutrients that play a crucial role in many bodily functions, including:

• Building strong bones and teeth
• Regulating body functions
• Maintaining healthy immune systems
• Supporting nerve and muscle function

Explanation

• The larval stage of a butterfly is known as a caterpillar.
• This stage is characterized by a worm-like body, multiple legs, and a voracious appetite for food (usually leaves or stems).

Explanation

• Giant pandas are an endangered species, due to habitat loss, low birth rates, and other factors.
• Conservation efforts are in place to protect this iconic species.