NAT SCIENCE 6 REVIEWER

What is an ecosystem?

• An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

• An ecosystem is a term used to describe a type of weather pattern.

• An ecosystem is a type of computer software used for managing data.

• An ecosystem is a group of people working together in an office setting.

Name the four main human body systems.

• skeletal system

• endocrine system

• excretory system

• circulatory system, respiratory system, digestive system, nervous system

Explain the process of photosynthesis.

• Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose molecules.

• Photosynthesis is the process of converting sound energy into chemical energy.

• Photosynthesis is the process of converting heat energy into electrical energy.

• Photosynthesis is the process of converting light energy into mechanical energy.

Differentiate between monocot and dicot plants.

• Monocot plants have one cotyledon, parallel leaf venation, scattered vascular bundles, fibrous root system, and flower parts in multiples of three. Dicot plants have two cotyledons, reticulate leaf venation, vascular bundles arranged in a ring, taproot system, and flower parts in multiples of four or five.

• Dicot plants have one cotyledon and fibrous root system.

• Monocot plants have two cotyledons and taproot system.

• Monocot plants have reticulate leaf venation and flower parts in multiples of four or five.

What is a food web and how does it differ from a food chain?

• A food web does not show the flow of energy and nutrients in an ecosystem.

• A food web is a network of interconnected food chains showing the flow of energy and nutrients in an ecosystem. It differs from a food chain by illustrating multiple feeding relationships and interactions among various organisms.

• A food web only includes herbivores and carnivores, excluding omnivores.

• A food web is a single linear chain of organisms in an ecosystem.

Define energy in the context of science.

• Energy is the ability to store information.

• Energy in science is the ability to do work or cause change.

• Energy is the ability to change color.

• Energy is the ability to control time.

How do living organisms obtain energy in an ecosystem?

• By generating energy from inorganic compounds

• By absorbing energy from the sun directly

• Through processes like photosynthesis and consumption of other organisms.

• Through cellular respiration only

What is the role of chlorophyll in photosynthesis?

• Reflect light energy back into the environment

• Store excess water for later use

• Regulate the temperature of the plant

• Absorb light energy and convert it into chemical energy

Give an example of a producer in a food web.

• Cow

• Plant

• Sun

• Cloud

Explain the concept of energy transfer in a food chain.

• Energy transfer in a food chain is solely dependent on the availability of water in the ecosystem.

• Energy transfer in a food chain involves the movement of energy from one organism to another through the consumption of food, with each step resulting in some energy loss.

• Energy transfer in a food chain occurs through the exchange of genetic material between organisms.

• Energy transfer in a food chain involves the movement of physical objects from one organism to another.