Interactions & Ecosystems
What is the difference between a need and a want?
A need is something that is necessary to survive. A want is something someone desires and it adds something to your life but it is not vital.
What are the two types of roots a plant can have?
Taproots & fibrous roots
State an example of thermal energy for heating.
-open fire
-stove
-igloo
-house heating
-furnace
-fireplace
Answers will vary
What is a force?
A force is a push or pull on something.
What is used to measure the hardness of a mineral. And what is the hardest and what is the softest?
The mohs hardness scale. Talc is the softest, diamond is the hardest.
What do all organisms need to survive?
Shelter, water, food, oxygen
What are the five things all plants need to grow?
Sunlight, proper temperature, moisture, air, and nutrients.
True or False: Energy can be created and destroyed
False
What are the 3 types of structures? And name a weakness for each.
Frame (they are weakest in the joints) , mass (they use a lot of material which can be costly), and shell( an imperfection can cause the whole thing to fail)
What are the three types of slow natural changes to the earth's surface?
Weathering, erosion, and deposition
State 3 ways to reduce your ecological footprint.
1. Be aware of the products you consume in a typical day
2. Reduce the energy you use
3. Reduce the number of products you buy
4. Reduce the amount of garbage you produce
(Answers will vary)
Nearly 75% of the world's food supply is based on seven major crops. Name two of them.
Wheat, rice, maize (corn), potatoes, barley, cassava and sorghum. Answers will vary
State 3 weaknesses of a regular laboratory thermometer.
-they can break easily
-the mercury inside them is poisonous.
-they do not measure very high temperatures
-they can be inaccurate
Answers will vary
Name 5 functions a structure may have.
· supporting (its own weight)
· containing (substances)
· transporting
· sheltering
· lifting
· fastening
· separating
· communicating
· breaking
· holding
Answers may vary
What is the difference between rocks and minerals?
Minerals have a definite chemical compound and rocks do not. Also rocks can have organic material in them and minerals can't.
Explain evaporation, condensation, transpiration, and precipitation in regards to the water cycle.
Evaporation: when water vapour from a body of water evaporates into the atmosphere.
Condensation: when the water vapour in the air changes into liquid water and collects in a cloud.
Transpiration: the loss of when water vapour from minute pores in a plant's leaves
Precipitation: the loss of water from clouds in the form of rain, freezing rain, sleet, snow, or hail.
Explain Diffusion &
osmosis
Diffusion: Diffusion is the tendency of particles in a gas or liquid to become evenly distributed by moving from areas of greater concentration to areas of lesser concentration. The particles continue to spread out until they are evenly distributed within the enclosed area.
Osmosis: Osmosis is a particular type of diffusion in which only some of the particles are allowed to pass through a barrier. This barrier is called a differentially permeable membrane. Osmosis is the diffusion of water through a differentially permeable membrane.
Name 5 functions a structure may have.
· supporting (its own weight)
· containing (substances)
· transporting
· sheltering
· lifting
· fastening
· separating
· communicating
· breaking
· holding
Answers may vary
Name 3 types of joints
Mobile Joints
Rigid Joints
Interlocking shapes
Adhesives
fasteners
What are five ways to identify a mineral?
Lustre, streak, colour, cleavage/fracture, and transparency.
Explain;parasitism, commensalism, and mutualism.
Commensalism: A relationship between two different organisms, in which one partner benefits from the relationship, while the other neither benefits, nor is harmed.
Parasitism:A relationship between two different organisms, in which one partner benefits from the relationship, while the other partner is harmed.
Mutualism:A relationship between two different organisms where they both benefit.
Name two plants that are used for medicine.
white willow bark
opium poppy's seed pod
Codeine
quinine
What does the particle model of matter state.
It states that
-All substances are made of tiny particles too small to be seen
-The particles are always in motion
-The particles have spaces between them
Name all the internal forces and explain where each would occur.
Tension (on the cables of a suspension bridge), compression (on the pillars of a beam bridge) , shearing (in scissors), and torsion (in the cables of a suspension bridge when wind is introduced).
Answers will vary.
Explain the rock cycle.
The rock cycle starts with magma cooling above earth and forming igneous rock. Then after weathering and erosion the rock turns into sediments. After compaction and cementation the sediments form sedimentary rocks. Then after heat and pressure these sedimentary rocks turn into metamorphic rocks. And then they eventually melt into magma and it starts again.