1
A tug-of-war that results in one team pulling the other across the line is an example of ___ forces.
unbalanced
When the forces acting on an object are ___, the net force is zero.
balanced
It is a change in position measured by distance and time.
Motion
Friction is a force that __ motion between two surfaces that are touching each other.
opposes
This tells us the speed and direction of a moving object.
Velocity
The S.I. Unit for Heat.
Joules (J)
It is a stalk-like structure that is connected to the spinal cord at the base of the skull. It contains neurons that relay information from the sense organs.
Brain Stem
The mass extinction was caused largely by global cooling and an ice age. Shifts in sea level and oxygen levels also played a role.
Ordovician Period
An organ system that includes the heart, blood vessels, veins, and arteries.
Circulatory System
A cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, and salamanders.
Amphibians
Give the four main lobes in the brain.
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
Give the three types of muscles.
Smooth Muscle
Cardiac Muscle
Skeletal Muscle
It is a group of animals with external spines, such as starfish, sea urchins, sand dollars, sea cucumbers, and sea lilies.
Echinoderms/ Echinodermata
It is made of soft-bodied animals with no bones. Most of them have a hard outer shell. This includes snails, slugs, clams, oysters, scallops, octopuses, and squids.
Mollusk/ Phylum Mollusca/ Mollusca
Occurs when species compete for the same resources, such as space or food.
Competition
Two types of Neurons.
Sensory Neurons
Motor Neurons
Differentiate Extinct to Endangered.
Endangered species: an animal or plant species in danger of extinction throughout all or a significant portion of its range.
Extinct species: a species that no longer exists.
This means that the left and right sides of the body are mirror images of each other.
Bilaterally Symmetrical
Why do we have the 'lub-dub' sound in our heart?
It is caused by the rhythmic closing of the heart valves as blood is pumped in and out of the chambers.
Give the parts of the respiratory system.
Nose/Mouth
Pharynx
Larynx
Trachea
Bronchi
Bronchioles
Alveoli
Differentiate Ectotherms to Endotherms.
Ectotherms - cold-blooded species
Endotherms - warm-blooded species
Give the 5 classes of Vertebrates.
Fish
Birds
Amphibians
Mammals
Reptiles
Differentiate Arteries, Veins, and Capillaries.
Arteries - carries blood away from the heart.
Veins - carries blood to the heart.
Capillaries - works with alveoli with the exchange of gases.
Give the 5 different animal interactions.
Parasitism
Commensalism
Mutualism
Predation
Competition
Give the 5 functions of the skeletal system.
Support
Protection
Movement
Storage
Blood Cell Production