March 23, 2022

- spend 45mins studying for science test. Learn to review questions presented in class

 

Science Pre-test, heat

 

1)    Name three ways how heat is transmitted

 

2)    In the electromagnetic spectrum, which wave has the highest energy?

 

3)    Name the pink material that is stuffed in the attic to insulate the house

 

4)    What is kinetic energy?

 

5)    Why do we sweat on a hot summer day?

 

6)    What is the ultimate source of energy?

 

7)    Name the chemical that keeps the fridge/freezer cold?

 

8)    Most AC units are installed outside the house. Why is that?

 

9)    Most furnaces are installed in the basements. Why is that? 

+ X + = +

+ X – = –

– X + = –

– X – = +

 

(–4)³                                                             –(4)³

= (–4) x (–4) x (–4)                   = – (4x4x4)

= 16 x (–4)                               = –64

= –64

 

 

(–7)⁶                                                                                                 –(7)⁶

⁼ (–7)x(–7)x(–7)x(–7)x(–7)x(–7)

= 49 x(–7)x(–7)x(–7)x(–7)

= –343x(–7)x(–7)x(–7)

=2401 x(–7)x(–7)

=–16807 x(–7)

= 117649

 

 

 

 

 

(–9)⁴                                                             –(9)⁴