What is the starting point of a river called?

The starting point of a river is called the source.

Rivers discharge their water into ___, ___, or ___ large bodies of water.

Seas, oceans, or large lakes

True or False: The Nile River is known as the shortest river in the world.

False. The Nile River is known as the longest river in the world.

Fill in the blank: Rivers usually begin as small ___ that join together.

Streams

Riddle: I am colorless but can appear bluish from a distance, what am I?

A river

What is the term for the place where a river meets the sea or ocean?

The river's mouth.

Multiple Choice: Which of the following is NOT typically true about rivers? A) They start from a source B) They can be colorless C) They never end in a body of water D) They can join to form larger rivers

C) They never end in a body of water.

What happens to rivers when they reach their mouth?

They discharge their water into seas, oceans, or large lakes.

What is water pollution?

Water pollution occurs when harmful substances contaminate water sources, making it unsuitable for drinking, cooking, swimming, and cleaning.

True or False: Industrial waste has no effect on water bodies.

False. Industrial waste can release chemicals and pollutants into water bodies, leading to pollution.

Washing utensils without proper disposal can lead to water pollution because ___ can contaminate water sources.

Soapy water

Riddle: I flow through rivers and lakes, but when contaminated, I can cause many aches. What am I?

Water

What are two activities that can introduce harmful substances into water sources?

Bathing animals and discharging untreated wastewater.

Fill in the blank: Cleaning household items with chemicals can pollute water bodies if the wastewater is not properly ___.

Managed

Multiple Choice: Which of the following is NOT a cause of water pollution? A) Washing utensils B) Industrial waste C) Clean water runoff D) Cleaning utensils

C) Clean water runoff

Fill in the blanks: Soluble substances can ___ in water, while insoluble substances cannot ___ in water.

Dissolve, dissolve

Riddle: I can dissolve in water, but I am not visible. What am I?

Sugar or salt

What observation can be made when combining oil and water in an experiment?

Oil does not dissolve in water; it forms a separate layer.

Fill in the blank: If substances like stones or plastic could dissolve in water, it could lead to ___ consequences for the environment.

Harmful

Why is it important to clean water before drinking it?

To remove harmful substances that could be dissolved in the water.

Multiple Choice: Which of the following is an example of an insoluble substance? A) Sugar B) Salt C) Sand D) Lemon Juice

C) Sand