Science Final Study Guide

To work, you need a ________ card.

Social Security

The capacity to do work is described as _______.

energy

Everything in the physical universe, left to itself, moves to a _________ state of entropy.

higher

0.8 L = 800 __

mL

The most basic need of any diet is ______ to maintain body fluids.

water

If the work output for a machine is 450 ft·lb and the work input is 600 ft·lb, what is the efficiency of the machine? 1. 100% 2. 80% 3. 75% 4. 60%

75%

7.5 m = ? cm

750

Respiration of people and animals uses __ and produces __.

O2 and CO2

The name of one of the best sources of information on employment information is ____________.

Occupational Outlook Handbook

Lightning represents a high discharge of ______ electricity.

static

Positrons, mesons, neutrinos and others are usually called ________ particles.

subatomic

Scientists who work to investigate new theories or formulate basic principles are considered _________ scientists.

theoretical

The chemical formula for photosynthesis is shown below. Chose which specific part is in photosynthesis. 6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2 6O2

to atmosphere

An acid and base combine to form a salt. True or False

true

Sugar water is a mixture. True or False

true

The midpoint of the pH scale is neutral. True or False

true

6 CO2 + 12 H2O -----> C6H12O6 + 6 H2O + 6 O2 Check the molecules that represent the source where glucose obtains its carbon. A. 6 CO2 B. 12 H2O C. C6H12O6 D. 6 O2 E. 6 H2O

6 CO2

250 mL = ? L

0.25

1 mL = ? cm3

1

What is the density of water?

1 g/cm3

Match the terms. 1. orderliness: nitrogen cycle 2. entropy: disorder in universe 3. legumes: nitrogen producers 4. conservation: control of fishing 5. chlorophyll: green color in plants 6. tracers: radioisotope 7. balance in nature: organized 8. sugar: C6 H12O6

1. balance in nature: nitrogen cycle 2. entropy: disorder in universe 3. legumes: nitrogen producers 4. conservation: control of fishing 5. chlorophyll: green color in plants 6. tracers: radioisotope 7. orderliness: organized 8. sugar: C6 H12O6

Match the terms. 1. kilogram: 1/1000 g 2. milligram: 1000 g 3. electrons: km/h 4. speed: negative particle outside nucleus 5. potential: centimeter 6. cm: energy at rest 7. mixture: distance × force 8. work: sawdust + salt + iron filings

1. kilogram: 1000 g 2. milligram: 1/1000 g 3. electrons: negative particle outside nucleus 4. speed: km/h 5. potential: energy at rest 6. cm: centimeter 7. mixture: sawdust + salt + iron filings 8. work: distance × force

Five good work habits are: 1. punctuality 2. slow and steady 3. courtesy 4. be dependable 5. let others start 6. be efficient 7. get by 8. be trustworthy

1. punctuality 2. courtesy 3. be dependable 4. be efficient 5. be trustworthy

How many atoms of hydrogen does alcohol (2C2H6O) have? 1. 2 2. 4 3. 6 4. 12

12

6 CO2 + 12 H2O -----> C6H12O6 + 6 H2O + 6 O2 __ hydrogen atoms are involved in this reaction.

24

6 CO2 + 12 H2O ----> C6H12O6 + 6 H2O + 6 O2 __ atoms of carbon are involved in this reaction.

6

6 CO2 + 12 H2O ----> C6H12O6 + 6 H2O + 6 O2 __ molecules of carbon dioxide gas combine with water in photosynthesis.

6

The molecule within a seed which controls and directs reproduction is called ___.

DNA

Every acid has _ atoms.

H

Corn, wheat, and tomatoes are legumes. True or False

False

Digestion is under your control. True or False

False

Good work habits are developed shortly before an interview. True or False

False

Machines are 100% efficient. True or False

False

Most food additives are used to increase nutritional value. True or False

False

Phase changes are chemical changes. True or False

False

The chemical formula for photosynthesis is shown below. Chose which specific part is in photosynthesis. 6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2 12H2O

From precipitation

The chemical formula for photosynthesis is shown below. Chose which specific part is in photosynthesis. 6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2 6H2O

Transpiration

A good diet is only a part of what the body needs for growth. True or False

True

Fats produce twice as much energy as carbohydrates. True or False

True

Heat is energy. True or False

True

The blood carries nutrients to where they are needed. True or False

True

Without photosynthesis, we would have no food. True or False

True

The lowest temperature possible is: 1. Fahrenheit 2. absolute zero 3. 10° Kelvin 4. -100° C

absolute zero

Which devices may overtax a community's electric power? 1. air conditioners 2. traffic signals 3. generators 4. computers

air conditioners

The organs of the digestive system are called the _______ canal.

alimentary

Why must both sides of a chemical equation balance? 1. chemical reactions cannot destroy matter 2. the number of atoms involved in the reaction must equal the number in the end product 3. "what goes in must come out" 4. all of the above

all of the above

The upward force that makes a cork float is called _________.

buoyancy

Substances made of two or more chemically bonded elements are _________.

compounds

If matter cannot be created or destroyed within the physical universe, then the total quantity must be ________.

constant

The transfer mechanism of heat through gases and liquids by circulating currents is called _______.

convection

Select the terms that correctly complete the First Law of Thermodynamics. Neither matter nor ______ can be created or _________ but they can be _________ from one ____ to another.

energy, destroyed, converted, and form

Potential energy is released whenever an object _____.

falls

Density is not a physical property of mass. True or False

false

The word atom means to fuse. True or False

false

The type of nuclear reaction that is described by an atom splitting to produce energy is called ________.

fission

The resistance of moving surfaces produces _______.

friction

The chemical formula for photosynthesis is shown below. Chose which specific part is in photosynthesis. 6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2 6CO2

from atmosphere

The chemical formula for photosynthesis is shown below. Chose which specific part is in photosynthesis. 6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2 C6H12O6

glucose

Any energy conversion process ultimately produces ____.

heat

The mineral needed in the thyroid is _______.

iodine

The mineral needed in blood is _____.

iron

What happens to the density of nearly all objects as they cool down? 1. it remains constant 2. it increases 3. it decreases

it increases

Food with very low nutritional value is called _______ food.

junk

1,000 g = 1 __

kg

When high velocity water strikes turbine blades, ________ ______ is converted to _________ _____.

kinetic energy and mechanical energy

The smallest unit of a substance consisting of two or more atoms is a(n) _________.

molecule

Atomic energy is stored within the _________ of an atom.

nucleus

The human body has the ability to select the _________ it needs from the foods you eat.

nutrients

To find the mechanical advantage of any machine, take the force ______ and divide by the force ______.

output and input

The minerals needed in bones are: 1. iron 2. enamel 3. phosphorus 4. magnesium 5. calcium 6. aluminum

phosphorous

All matter has a particular set of characteristics known as ________ properties.

physical

The change of size or shape of a substance is a ________ change.

physical

An atom which loses an electron becomes _______ charged.

positively

The bacteria which assists in nitrogen fixation is ________.

rhizobium

Aristotle did not experiment to verify his ideas; therefore, he was not a _________ but a _________.

scientist and philosopher