Inquiry, Technology, and Engineering
Biodiversity and Change
Chemical Reactions
Properties of Matter
Forces of Nature
100
You are conducting an experiment to identify from what height you can drop an egg and it land safely. Identify what an independent variable, dependent variable, and constants would be for this experiment.
Independent - different heights

Dependent - if the egg cracks or not

Constants - type of egg, treatment of egg, surrounded or plain egg, date you bought the egg

100
How do you read a geologic column to identify the oldest fossil?
The oldest is at the bottom
100
Give an example of a physical change and a chemical change
physical - melting, freezing, dissolving

chemical - burning, rotting

100
What is the smallest particle of matter?
Atoms
100
What is an electromagnet (what do you create with one) and what do you use to make one?
It creates a magnet/magnetism. You use a power source, nail (iron core), and copper wire
200
What is an intended benefit and unintended consequence of ethanol being used in cars today?
intended benefit - cheaper fuel and fuel efficiency

unintended consequence - corn prices, decreased corn crops

200
What is a classification key used for?
To identify organisms based on their similarities and differences - each branch is a set of opposites.
200
How can you identify an element, compound, and a mixture? (chemical formula or explanation)
Element - single capital letter or capital and lowercase letter, simplest form of matter that is made of only 1 thing/type of atom


Compound - multiple elements BONDED together

Mixture - easily separated by PHYSICAL means

200
What is the particle arrangement and movement in the 3 states of matter?
solid - tightly packed, pattern, vibrates

liquid - closely packed, no set pattern, slide past one another

gas - no pattern, bounce around, fill entire space

200
A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity?

a. The student uses a horseshoe magnet instead of a bar magnet

b. The student moves the bar magnet through the copper wire coils

c. The student insulates the copper wire with plastic

b. The student moves the bar magnet through the copper wire coils
300
An emergency-equipment company makes warning-signal flares. The company wants to redesign a flare so that it produces light for a longer period of time. After the company thinks of ideas, what is the next step in the design process?

a. build a prototype

b. define the problem

c. decide on the best improvement

c. decide on the best improvement
300
Define structural adaptation and behavioral adaptation
structural - the way an animal looks or is built that helps it survive in its environment

behavioral - the way an animal acts that helps it survive in its environment

300
Where do you find the reactants and products in a chemical formula?
Reactants - on the left

Products - on the right

300
What are the 2 main gases in Earth's atmosphere and their percentages?
Nitrogen - 78%

Oxygen - 20%

300
Invisible magnetic fields exist around permanent magnets, electromagnets, and our planet. Which statement best compares the magnetic field of Earth to the magnetic field of a bar magnet?

a. Magnetic field lines for both Earth and a bar magnet are generated from convection currents

b. Magnetic field lines around Earth are symmetrical but magnetic field lines around a bar magnet are not symmetrical

c. Magnetic field lines for both Earth and a bar magnet emerge from the north pole

c. Magnetic field lines for both Earth and a bar magnet emerge from the north pole
400
Someone conducts an experiment to see which type of weed killer is most effective at killing weeds. What could be one possible source of bias for this person to determine that one brand is the most effective?
Possible answers: a family member owns that brand, they used more of that brand than any other, etc.
400
Between 1980 and 1990 the insects were sprayed with an insecticide that caused the population to decrease. From 1990 to 2000 the insects were sprayed with the same insecticide, but the population increased.

What most likely caused the population to increase?

a. The concentration of insecticide was too great, and therefor biodiversity was reduced.

b. Due to genetic variation, the farmer sprayed too much insecticide on his crops.

c. Due to genetic variation, the insect population adapted to the insecticide

c. Due to genetic variation, the insect population adapted to the insecticide
400
Give 3 properties of an acid AND 3 properties of a base
Acid - sour, corrosive, pH less than 7

Base - bitter, corrosive, pH greater than 7

400
What do the following three elements have in common? 

Atomic Number 19, Atomic Number 55, and Atomic Number 87

a. They are in the same period and they are all very reactive

b. They all have one valence electron and they are very reactive

c. They all are alkaline-earth metals with three valence electrons

b. They all have one valence electron and they are very reactive
400
Define Mass and Weight AND what tool you would use to identify both.
Mass - the amount of matter in an object, triple-beam balance


Weight - the amount of gravitational force exerted on an object, spring scale

500

A student wanted to find out if marbles with larger diameter made deeper craters when dropped into wet sand than marbles with smaller diameters. The following shows the student's data

Marble  Diameter  Marble Mass  Height Drop Marble  Crater Depth

1               13           21                         2                       4

2               14           18                         2                       3

3               15           23                         2                       6

4               16           20                         2                       5

The student concluded marble diameter had no affect on crater depth. Which is most likely the reason this conclusion is flawed?

a. The student should have used more marbles that had the same mass

b. The student should have used more than four marbles

c. The student should have dropped the marbles in flour instead of sand

a. The student should have used marbles that had the same mass.
500
What is biodiversity and why is having biodiversity important?
Biodiversity - "differences in life" - populations having different genes and traits which create variety in a population of organisms


Importance (varies) 

500
The law of conservation of mass states that no mass is created or destroyed during reactions. Which procedure best represents the law of conservation of mass?

a. Combining 2g of copper and 4g of sulfur to produce 6g of copper sulfate

b. Using filter paper to separate 2g of solid from 10g of water

c. Burning 2kg of wood, leaves 0.4kg of ash

a. Combining 2g of copper and 4g of sulfur to produce 6g of copper sulfate
500
While doing an experiment in science class, Lenny accidentally drops his pencil into a graduated cylinder. The pencil has a mass of 12 grams and the water level in the cylinder rises from 41mL to 44mL. Determine the density of the pencil.


4g/mL
500
What are the two things that affect gravitational pull between two objects? AND HOW do those affect the amount of gravitational force
Mass and distance


More mass = more gravity

More distance = less gravity

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