Physical Science
True or False: A Physical Change is observed WITHOUT changing the substance's identity.
True
Ex: Cutting a paper in half
Give an example of a biotic factor
Animals, Plants, Fungi, Bacteria
Name one moon phase.
New moon, full moon, waxing/waning gibbous, waxing/waning crescent, 1st or 3rd quarter
Explain one stage of the water cycle.
Precipitation: water falls down (rain, snow, etc.)
Condensation: clouds are formed (gas to liquid)
Evaporation: water goes into the atmosphere (liquid to gas)
False. They're good conductors
What's the difference between Kinetic and Potential Energy?
Kinetic: Motion (ex: a car driving down the road)
Potential: Stored (ex: a rubber band pulled back)
Desert, Tundra, Rainforest, Deciduous Forest, Coniferous Forest, Grassland, Savanna
Solstices mark the beginning of what two seasons?
Summer and winter
Troposphere
What is the atomic number of an element? Hint: they're the positive part of the atom
Number of protons
What is the difference between a qualitative and quantitative observation?
Qualitative: uses words (ex: blue pants)
Quantitative uses numbers (ex: 12 birds)
What's the difference between an ecosystem and a habitat?
Ecosystem: organisms and the area they live in
Habitat: just the area that is lived in
What causes the seasons?
Earth's tilt on its axis
What would happen if the hole in the ozone layer grew?
What is a compound?
2 or more elements combined chemically
What 3 things are needed for a closed circuit to work?
Conductor (wire), Voltage (power source aka battery), and Resistor aka lightbulb
What would happen to the frog population if the fly population decreased?
The frog population would also decrease.
Explain what happens during either a solar or lunar eclipse.
Solar: Happens at the new moon phase where the moon's shadow blocks out the sun
Lunar: Happens at the full moon phase where the Earth's shadow blocks out the moon.
Explain the roles of producers and consumers and their relationship.
Producers are plants that make their own food. Consumers eat producers for energy or they eat other consumers.
What is the equation for density?
Mass divided by volume
What's the difference between (energy) transfer and transform?
Transfer: move the energy (ex: Kicking a ball)
Transform: changing the form of energy (ex: a car starting and then driving off)
Give an example of natural selection (aka: Survival of the "fittest')
Over time, the bird population with sharper beaks survived better than birds with dull beaks because they were able to break open shells easier.
What's the difference between Spring and Neap Tides?
Spring: Earth sun and moon are in a line, greatest difference between tides, happens at full and new moon
Neap: Earth, sun and moon are at a right angle, least difference between tides, happens at 1st and 3rd quarter
What do plants take in and put out during Photosynthesis?
Water + CO2 + Sunlight ---> Glucose + O2
Explain the difference between a heterogeneous and homogeneous mixture.
Homogeneous: mixed evenly, like salt water
Heterogeneous: not mixed, like a lava lamp