What is a Dog?
Dogs are domestic mammals, and they are a subspecies of the grey wolf. Dogs are carnivorous, and they usually eat meat.
What is a Cat?
Cats are domestic mammals and thev are a subspecies of [...]
What is a Reptile?
Reptiles are cold-blooded vertebrate animals. They have a dry skin [...]
What is a Tsunami?
Tsunamis are giant waves caused by earthquakes, tremors or volcanic eruptions under the sea.
What is an Earthquake?
An earthquake or tremor is an intense shaking of Earth's surface caused by activity movements in Earth's outermost layer.
What is a Mammal?
Mammals are warm-blooded vertebrate animals that have hair, breathe air, [...]
What is the Ocean?
Oceans are big areas of salt water that cover around 72% of the Earth's surface. Oceans greatly influence the weather and temperature.
Acids and Bases
This educational file shows you the main differences between acid [...]
What is a base in chemistry?
A base is a chemical substance that has a pH higher than seven. On a scale from O to 14, lower pH solutions are strong acids; higher pH solutions are bases.
What is an Acid in Chemistry?
Acid is a chemical substance that has a pH lower than seven. On a scale from O to 14, lower pH solutions are strong acids
