6th Grade FINALS

Which organisms do primary consumers mainly eat?

• Producers

• Secondary consumers

• Predators

• Decomposers

In many cases, secondary consumers cannot digest the bones of their prey. What conclusion can you draw from that?

• Eventually, all of the energy in those ecosystems will go towards bone formation

• No energy is required to form bones

• Energy used to create bone mass often does not travel farther up the food chain

• Primary consumers form bones from the parts of plants they cannot digest

. In most food chains, all of the energy originally comes from:

• Plants

• Dead matter that's been recycled by decomposers

• Heat from deep within the Earth

• The Sun

In a marine food chain, small fish eat plankton, big fish eat small fish, and sharks eat big fish. Which organism has the smallest population?

• The plankton

• The sharks

• The small fish

• The big fish

Where does the energy in most ecosystems originate?

• Sunlight

• Producers

• Water

• Air

The picture shows a microscopic view of blood. Blood is made of different types of cells that work together.

What is true of blood cells?

• They are very large.

• They are part of a living thing.

• They are made up of other cells.

• They make up unicellular organisms.

Aurora is studying the levels of structural organization of an animal’s body. Which level would describe a dog’s eye?

• organ

• tissue

• organism

• organ system

One part of the cell theory states that all living things are made up of one or more cells. Scientists had to find ways to test this theory. Which investigation could scientists use to test this part of cell theory?

• heat plant or animal tissue on a hot plate

• test plant or animal tissue with a pH meter

• examine plant or animal tissue with a microscope

• measure the mass of plant or animal tissue with a scale

A student is studying the levels of organization in living things and creates a table to give examples of the different levels.

Which of these should the student write as an example of the ORGANISM level of organization?

• human

• stomach

• connective tissue

• . food, water, and air

When scientists make a model to study a system, such as a coral reef or the human body, which of these should they be sure to include?

• include only inputs

• include no set boundaries

• include a limited number of parts

• include both biotic and abiotic influences