Quarter 1 Science Test Review

Where do plants get most of the materials they need for growth?

• Sunlight

• Soil

• Air and water

• Fertilizer

Answer explanation

Plants primarily obtain materials for growth from air and water. They use carbon dioxide from the air and water from the soil to perform photosynthesis, which is essential for their growth and energy production.

What part of the human body is responsible for pumping blood throughout the body?

• Liver

• Lungs

• Brain

• Heart

Answer explanation

The heart is the organ responsible for pumping blood throughout the body, supplying oxygen and nutrients to tissues while removing waste products. The liver, lungs, and brain have different functions and do not pump blood.

Which of the following best describes the difference between an exoskeleton and an internal skeleton?

• An exoskeleton is found inside the body, while an internal skeleton is outside.

• An exoskeleton provides external support, while an internal skeleton provides internal support.

• Both provide internal support.

• Both provide external support.

Answer explanation

An exoskeleton is an external structure that supports and protects organisms like insects, while an internal skeleton, or endoskeleton, is located inside the body, providing support to vertebrates. Thus, the correct choice highlights this distinction.

When the environment changes, what happens to plants and animals?

• They all die.

• They adapt, move, or die depending on their traits.

• They all move to new locations.

• They stop reproducing.

Answer explanation

When the environment changes, plants and animals can adapt to new conditions, move to more suitable locations, or, if they cannot cope, they may die. This response depends on their specific traits.

What is an adaptation that allows plants to survive in dry environments?

• Large leaves to catch more sunlight

• Thick bark to protect against cold temperatures

• Long roots to reach deep water sources

• Brightly colored flowers to attract pollinators

Answer explanation

Long roots allow plants to access deep water sources, which is crucial for survival in dry environments. Other options do not provide the necessary adaptation for drought resilience.

How do plants contribute to the movement of matter in an ecosystem?

• By storing energy in their roots

• By providing shelter for animals

• By decomposing dead organisms

• By taking in air, water, and sunlight to create food

Answer explanation

Plants contribute to matter movement by taking in air, water, and sunlight to create food through photosynthesis. This process forms the basis of energy flow in ecosystems, supporting various life forms.

How can communities use science to protect the Earth's resources and environment?

• By increasing waste production

• By using more fossil fuels

• By ignoring climate change

• By planting trees and reducing pollution

Answer explanation

Communities can protect the Earth's resources by planting trees, which absorb CO2, and reducing pollution, which helps maintain a healthy environment. This approach directly addresses environmental issues, unlike the other options.

Compare and contrast how plants and animals support their bodies. Include examples of plants and animals with different support systems.

Answer explanation

Plants use rigid cell walls for support, as seen in trees. Animals have skeletal systems, like bones in mammals, providing structure and protection. Both systems enable growth and movement, but differ in composition and function.

Describe how a change in the environment, like a drought, might affect a plant species and the animals that depend on it.

Answer explanation

A drought reduces water availability, stressing plant species and potentially leading to their decline. Animals that rely on these plants for food and habitat may face starvation or displacement, disrupting the entire ecosystem.

What process do plants use to make their own food?

• Respiration

• Fermentation

• Digestion

• Photosynthesis

Answer explanation

Plants use photosynthesis to make their own food. This process involves converting sunlight, carbon dioxide, and water into glucose and oxygen, providing energy for growth and development.