7 th Grade End of the Year Test Review!!!!

A is the basic unit of structure and function in all living things. All living things are made of.

A cell is the basic unit of structure and function in all living things. All living things are made of cells.

Your heart is made up of specialized muscle cells that…..

Do not produce waste…This way, you never have to worry about your heart cramping up.

What is the function of the digestive system?

Break down large molecules into smaller ones.

List some chemical changes (creating new substances) that occur during digestion.

Reaction to stomach acid Reaction to saliva Reaction to pancreatic juice

That are the main elements found in organic compounds?

That are the three main elements found in organic compounds? Carbon, Hydrogen, and Oxygen

Over hunting, deforestation, and pollution can result in…..

Reduced Biodiversity

What is Ecological succession?

A sequence of events that allow new life to move into an old ecosystem.

Consumers often have to eat food so that they can stay warm. What energy transformation is taking place?

Chemical (food) to thermal (heat)

This is a model of our solar system. What would be some limitation of this model?

This is a model of our solar system. What would be a limitation of this model? This does not truly show the distance between planets. The size of the Sun and planets are not the correct size

If a large volcanic eruption produced ash and gas into the atmosphere, what kind of affect could it have on the environment and climate?

It can block the sunlight, causing plant growth to slow or stop (leading to famine and create cooler temperatures

What are the three most important things a planet must have to potentially have life?

For a planet to have life, it needs to be in the inhabitable zone of a star, and have oxygen and liquid water.

What is the weight on this triple beam balance?

373.4 grams

How can an earthquake affect the Earth?

Creates Tsunamis (if earthquake is in ocean) Can shape or reshape mountains Can destroy homes, roads, and buildings

What are Ecoregions in Texas?

Areas in Texas that can be divided into geographically similar areas defined by climate and animal/plant species that stay in the relatively same area.

Which ramp will require more work to roll the cart up?

They are going to be the SAME amount of work. The only difference will be that the longer ramp will require less input force.

Which situation shows work being done? or

Which situation shows work being done? or ↑ This guy because the cart is actually moving. You have to apply a force and the object has to move!

The roots growing down toward the Earth would be an example of???

GEOTROPISM (growing toward the Earth)

What would most likely happen to the blue birds in this ecosystem if the number of caterpillars increased?

What would most likely happen to the blue birds in this ecosystem if the number of caterpillars increased? The blue bird population would increase

Photosynthesis is the process that allows plants to convert ______ energy (from the sun) into stored, _______ energy.

Photosynthesis is the process that allows plants to convert Radiant energy (from the sun) into stored, Chemical energy.

Compost bins can break down dead plant matter and create a nutrient rich byproduct. What type of energy is released by this decomposing material?

HEAT

What types of organisms break down other DEAD organisms and release their nutrients back into the ecosystem?

DECOMPOSERS

External stimulus and cause internal responses. Can you give an example?

Something scares you, causing your muscles to tense up, and heart beat fast.

The “brain” of a cell is the _______ Inside of the _______ there are ________________, which contain ________ __________

The “brain” of a cell is the NUCLEUS Inside of the NUCLEUS there are CHROMOSOMES, which contain GENETIC MATERIAL.

What is it called when you breed two specific animals in order to produce offspring which have specific traits? (Like large cows that would produce more beef)

Selective Breeding

Fish gills are organs that allow for?

GAS EXCHANGE

The passing of genetic information form one generation to the next is called?

HEREDITY!

What would be a trait of a small animal that spends its entire life in a cave in the dark (troglobites)?

-Poorly developed vision -Lack of pigment -Highly developed sense organs like antenna.

There are two types of behavioral adaptations….what are they?

-Learned (think of a pack of dogs) -Instinctual (think hibernation, or active at night)

Why would a liner be useful in a landfill?

To prevent chemicals and toxins from seeping into the groundwater. Cities would also have to consider what type of trash is allowed and how much could fit in the landfill!

A cow’s 4 chambered stomach would be an example of an ________ adaptation

A cow’s 4 chambered stomach would be an example of an INTERNAL adaptation

Dichotomous keys look at ______ in order to ________ animals

Dichotomous keys look at TRAITS in order to IDENTIFY animals

Plants have two organelles in their cells that animals do not have: -__________for performing photosynthesis -_______ to allow cells to stack like bricks and give the plant strength (remember that plants do not have bones!) -Plants also have extra large vacuoles for water storage (animals also have vacuoles)

Plants have two organelles in their cells that animals do not have: -Chloroplast for performing photosynthesis -Cell Wall to allow cells to stack like bricks and give the plant strength (remember that plants do not have bones!) -Plants also have extra large vacuoles for water storage (animals also have vacuoles)

_______ is a type of reproduction where there is only one parent (not two) and the offspring are genetically identical.

Asexual is a type of reproduction where there is only one parent (not two) and the offspring are genetically identical.

A gas well is built in your neighborhood. Why could this be a concern for drinking water?

Chemicals from frac water could seep into and contaminate ground water.

The heart, stomach, intestines are examples of what level of origination?

ORGANS

____________ are the “powerhouse’s” of the cell. They produce the energy.

Mitochondria are the “powerhouse’s” of the cell. They produce the energy.

Functions of the Skeletal System:

Protects Vital Organs Provides Framework Produces Red Blood Cells

Give some examples of MICROHABITATS:

Under a rock A puddle A rotting log In one bush

Guess which way the plant will grow?

Guess which way the plant will grow? The plant will bend and grow towards the light (phototropism)

This body system produces chemical messengers called hormones that control homeostasis, development, and growth

Endocrine System