Vocabulary practice
Ex. 1. Make sure you understand and can explain the following terms and notions:
Physical Sciences, matter, velocity, acceleration, composition, motion, fusion, conductor.
Ex. 2. Complete the following sentences with the appropriate word.
1. The nucleus contains positively charged ….
2. Matter consists of ….
3. A … is formed when two or more elements unite chemically.
4. … energy is stored energy or energy ready to be released.
5. … are the building blocks of chemistry
Ex. 3. Supply the sentences with required words; if necessary change their grammatical forms.
work weight light force wave mass motion
1. The … of matter is a measure of the force that gravity places on its mass.
2. … is energy that causes a change in an object's motion or shape.
3. … is the movement of a body by a force.
4. … is the amount of matter in a body and is a measure of the body's inertia.
5. The frequency of a … is the vibrations per second.
Ex. 4. Choose the alternative that best suits the context.
1. The … of matter is a measure of the force that gravity places on its mass.
2. When acids and bases are combined chemically, they form ….
3. Batteries used in a toy or flashlight are … batteries.
4. Electricity speeds through … such as copper.
5. Most light is produced by heated … vibrating at high frequencies.
REVIEW QUESTIONS
1. What subatomic particles do atoms consist of?
2. How can matter be destroyed?
3. When do chemical reactions occur?
4. Does a body's mass vary?
5. What two factors determine a body's velocity?
6. What type of energy does fuel in a car’s tank represent?
7. Through which medium does sound travel most quickly?
8. What charges may an object possess?
9. Where is the magnetic North Pole?
10. What is the advantage of nuclear fusion over nuclear fission?
SCIENCE PRACTICE ITEMS
Science items will help you practice the concepts in this review section. The items you encounter on the real LAST may have a different emphasis and may be more complete. Complete the items in 20 minutes or less. See APPENDIX E.
APPENDIX E
Science practice items
1. The following are parts of all cells EXCEPT:
(A) chloroplasts
(B) cytoplasm
(C) nucleus
(D) cell membrane
2. Cells may reproduce through:
(A) photosynthesis
(B) mitochondria
(C) mitosis
(D) eukaryotes
3. All the following are cell activities EXCEPT:
(A) homeostasis
(B) respiration
(C) ingestion
(D) chromosome
4. The genetic material termed DNA has the following function:
(A) It divides the nucleus acid in genes
(B) It provides the genetic codes that determine many traits of an organism
(C) It carries the genetic code throughout the cell
(D) It arranges rodlike structures located in the cell nucleus
5. All the following belong to the class called mammals EXCEPT:
(A) moles
(B) humans
(C) monkeys
(D) carp
6. Which of the following is not one of the five kingdoms living things are generally classified into?
(A) Moneran.
(B) Fungi.
(C) Plantae.
(D) Reptilae.
7. Find the statement about bacteria that is not true.
(A) Bacteria help decompose dead matter.
(B) Bacteria cause disease.
(C) Bacteria help regular physiological processes.
(D) Bacteria are lifeless and lack the ability to reproduce.
8. Which is the correct hierarchy of the body makeup:
(A) tissues-cells-organs-systems-body
(B) cells-tissues-organs-systems-body
(C) cells-tissues-systems-organs-body
(D) tissues-cells-systems-organs-body
9. Which of the following definitions best describes the meaning of ecology?
(A) Recycling to keep the human habitat as pure as possible.
(B) The relationship between organisms and their habitat.
(C) Making use of natural materials from our habitat.
(D) Keeping the biosphere free of toxic materials.
10. Which is a false statement about matter?
(A) Matter is anything that has mass and takes up space.
(B) Matter is made up of atoms.
(C) Matter cannot be changed, created, or destroyed.
(D) The weight of matter depends on gravitational force.
11. A person is driving a car; what types of energy are represented respectively by the gas in the tank and the motion of the car?
(A) Kinetic, potential.
(B) Activation, kinetic.
(C) Potential, activation.
(D) Potential, kinetic.
12. Which of the following is the description of heat?
(A) Temperature.
(B) Energy in motion.
(C) Radiation.
(D) A temperature measurement.
