CAST Practice Flashcard (Gr. 8)

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

Front

What effect does light intensity have on photosynthesis?

Back

Light intensity affects the rate of photosynthesis; higher light intensity generally increases the rate, while lower light intensity can reduce it.

Front

What is a La Nina event?

Back

A La Nina event is a climate pattern characterized by cooler-than-average sea surface temperatures in the central and eastern Pacific Ocean, which can influence weather patterns globally.

Front

How do greenhouse gases affect Earth's temperature?

Back

Greenhouse gases trap heat in the atmosphere, leading to an increase in Earth's average temperature, a phenomenon known as the greenhouse effect.

Front

What is the role of sunlight in photosynthesis?

Back

Sunlight provides the energy needed for photosynthesis, allowing plants to convert carbon dioxide and water into glucose and oxygen.

Front

What is a magnetic field?

Back

A magnetic field is a region around a magnet where magnetic forces can be detected, influencing the behavior of charged particles and magnetic materials.

Front

How can you demonstrate the existence of a magnetic field?

Back

You can demonstrate a magnetic field by showing that a magnet can influence the movement of a small metal object, such as a ball, without direct contact.

Front

What are aerosol particles?

Back

Aerosol particles are tiny solid or liquid particles suspended in the atmosphere, which can affect climate by scattering or absorbing sunlight.

Front

What is the relationship between volcanic eruptions and climate?

Back

Volcanic eruptions can release ash and gases into the atmosphere, which can block sunlight and lead to temporary cooling of the Earth's surface.

Front

What is the significance of measuring temperature changes over time?

Back

Measuring temperature changes over time helps scientists understand climate trends, assess the impact of human activities, and predict future climate scenarios.