7th Grade - Science - Review 1st Semester

Home

Get App

Take Quiz

Create

What is the equation for photosynthesis?

6CO₂ + 6H₂O + Sunlight → C₆H₁₂O + 6O₂
What is C₆H₁₂O

Glucose
What are examples of producers?

Green plants and other autotrophs
All the energy comes initially from the ____

sun
What is a consumer?

All heterotrophs
All consumers need ____

energy
Consumers get energy from ____

the food they eat
What are primary consumers

animals that eat green plants
Primary consumers are also called

herbivores
What are secondary consumers?

Animals that eat other animals
Secondary consumers are also called

carnivores
What is an omnivore

Animals that eat both plants and animals
Are omnivores primary or secondary consumers or both?

Both
What are decomposers

Organisms that break down the remains of dead organisms and organic wastes
What are most organisms?

Bacteria and fungi
What are scavengers

Organisms that help keep the environment clean by eating the remains of dead or dying animals.
How does decay of biomass in a compost bin cycle matter in living systems

Biomass is broken down and nutrients are cycled back into the soil
What 2 process cycle carbon dioxide in living systems

Respiration (breathing) and photosynthesis
Which form of nitrogen is usually absorbed from the soil by grass

Nitrates (NO₃)
How is nitrogen both removed from the atmosphere and returned from the atmosphere
- Plants and animals
- Bacteria
How do animals get nitrogen

From plants
How does biodiversity contribute to the sustainability of an ecosystem?

Biodiversity creates a stable ecosystem because then if a crisis happens that endangers a species there are other species to take its place
Selective Breeding

humans picking the 2 mates
Natural Selection

When nature selects the mates to create the best adapted offspring for the environment
Surface Water

Water found in rivers, lakes, oceans, and streams
What can pollution do to ground water?

It can leach contaminants to the groundwater supply below
Porosity

The size of the void or open spaces found in rocks or sediments?
Permeability

How well fluids can pass through a membrane or rock
Absorbency

How much fluid can be soaked up
Sustainability

how well biological systems remain diverse and productive
5 ways humans have a negative impact on ground water
- farming
- pesticides
- manure
- sewage
- car washing
3 major erosional forces
- water
- air
- ice
Delta

deposition of sediment at the mouth of a river
How was Palo Duro Canyon formed

Water
3 factors that can effect weathering
- Surface area
- temperature
- type of material
4 pieces of evidence to support continental drift theory
- Continents fit
- rocks
- fossils
- climate
Primary Succession

Occurs when no soil is present
Primary species

First organisms to live in the area
Organisms that live on bare rock

Moss and lichen
What happens when moss and lichen grow

They release acid that breaks down the rock and forms soil
What happens when moss and lichen die

Their remains are broken down and added to the broken down rock to create soil
When do bushes and ferns appear based on succession

When the moss and lichen have formed enough soil.
What happens when ferns and bushes die.

Their remains add nutrients to the soil.
Based on succession what comes after buses and ferns

shrubs, trees, insects, birds and mammals
Secondary succession

Occurs when bare soil is present. The soil already contains nutrients of weeds, grasses and trees.
How are new seeds brought to a new area

By wind and water
Which occurs faster, primary succession or secondary succession?

secondary succession
Climate community

A community that has been established for a while

Author

Bookworm48

293012

Card Set

7th Grade - Science - Review 1st Semester

Description

Science Review

Updated

2015-01-15T00:45:01Z