Praxis 5005 Physical Science Complete Answers

Praxis 5005 Physical Science Complete Answers 1. Matter and Properties What are the fundamental properties of matter? A. It takes up space and has mass B. It can be seen and touched C. It can be heard and smelled D. It can be tasted and felt Answer: A. It takes up space and has mass 2. Atomic Structure What is the smallest unit of an element? A. Molecule B. Atom C. Compound D. Element Answer: B. Atom 3. Chemical Properties What type of property cannot be observed or measured without changing the composition of the substance? A. Physical property B. Chemical property C. Both physical and chemical properties D. Neither physical nor chemical properties Answer: B. Chemical property 4. Laws of Motion Which law states that an object at rest will remain at rest, and an object in motion will remain in motion, unless acted upon by an external force? A. Newton's First Law of Motion B. Newton's Second Law of Motion C. Newton's Third Law of Motion D. Law of Universal Gravitation Answer: A. Newton's First Law of Motion 5. Energy and Work What type of energy is associated with motion? A. Kinetic energy B. Potential energy C. Both kinetic and potential energy D. Neither kinetic nor potential energy Answer: A. Kinetic energy 6. Waves What type of wave is characterized by a transfer of energy through a medium without the transfer of matter? A. Mechanical wave B. Electromagnetic wave C. Both mechanical and electromagnetic waves D. Neither mechanical nor electromagnetic waves Answer: B. Electromagnetic wave Diffraction ️the bending of waves around obstacles and the spreading out of waves beyond small openings ex: thunder Electromagnetic spectrum ️-Radio waves -Microwaves -Infrared radiation -Visible light -Ultraviolet -X-rays -Gamma rays Concave mirror ️light is reflected such that angle of incidence equals angle of reflection and they all meet at point called focus or focal point; image is REAL, UPSIDE DOWN, and SMALLER