Which term describes a reflected sound?
a frequency
b. wave
c. echo
d. pitch

Which of the following situation describes a vector quantity?
a. An airplane leaves Cagayan de Oro at 10:00 A. M. and flies at 200 km/h
b. A car travels for 2 hours and covers a distance of 80 km.
C. A ship is sailing at 40 km/h against waves that travels 10 m/s
d. A train travels a distance of 200 km north from its starting point
For entst

71. A ball is thrown straight up. At the top of its path its acceleration is
a O m/s2
b. about 5 m/s2
c. about 10 m/s2
d. about 20 m/s2

Which of the following is the correct unit of momentum? P = mv (kgm/s]
a N.m
b N/m
CNS
d N/s2

Which is not true about mass?
a. Mass is the amount of matter present in an object
b. Mass remains the same anywhere.
C. Mass can be measured by a platform balance
D. Mass is the pull of gravity on an object.

Density of a substance is its mass per unit volume. A piece of brass has a mass of 16.0 g and
a volume of 1.9 cm? The density of the brass in grams per cm is
a 0.84
b. 8.4
c. 840
d. 1.84

Which statement is true about the pituitary gland? 1. It consists of anterior and posterior lobes 2.
The anterior lobe is connected to the hypothalamus via nerves 3. Cells of the anterior lobe produce
growth hormone 4. Cells of the anterior lobe produce oxytocin. 5. It is located below hypothalamus.
b. 1,2,3
e. 2,4
d. 3.4.5
a. 5.
C. 1.3.5

Shoulder ball-and-socket joint as elbow:
a. Immovable joint
b. Pivot joint
d. Hinge joint
c. Gliding joint

Which of the following levels of organization is not matched with appropriate structure?
a Tissue: Nerve
b. Organ: Liver
c. Cell: Stomach
d. Organ: Skin

Zoologist study the following process, except_____
a. non-living things of an ecosystem
b.weather and climate
c. living organisms in an ecosystem
d. all of the above​