Science Semester Exam

Front

What type of rock do geologists use to study fossils?

Back

Sedimentary rocks are formed from the accumulation of sediment and are the primary type of rock in which fossils are found.

Front

What is the result of a chemical reaction?

Back

A new substance with different properties is formed.

Front

What is an example of a chemical reaction?

Back

Burning paper is a chemical reaction because it produces ash and smoke, which are new substances.

Front

Which organism has the most energy in an energy pyramid?

Back

Phytoplankton have the most energy because they are primary producers.

Front

How many Hydrogen (H) atoms are in Glucose?

Back

There are 12 Hydrogen (H) atoms in Glucose (C6H12O6).

Front

What is the definition of a chemical reaction?

Back

A process in which substances (reactants) are transformed into new substances (products) with different properties.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not alter the chemical composition of a substance, while chemical changes do.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation of the energy flow in an ecosystem, showing the energy available at each trophic level.

Front

What are the three main types of rocks?

Back

The three main types of rocks are igneous, sedimentary, and metamorphic.

Front

What is the role of producers in an ecosystem?

Back

Producers, like plants and phytoplankton, convert sunlight into energy through photosynthesis, forming the base of the food chain.