What is gravity?*

Who figured out how gravity works?*

What is the acceleration due to gravity on Earth?

Which kind of friction is generated by two motionless objects?

What kind of friction is generated by a rolling object and the surface it's rolling on?

What does friction prevent?

What effect does friction have on the speed of objects?

What opposes the motion of objects?

What are the "enemies" of machines?

How can friction be reduced?

What is the central system of nerves in vertebrates called?

Which class of vertebrates is covered with feathers?

Cartilaginous fishes are in which class of fish?

Which class of vertebrates can control their body temperature

Why do amphibians lay their eggs in water?

What happens to reptiles' scales as they grow?

In what group of mammals do platypuses and echidnas belong to?

What kind of mammals are human beings?

What is the only order of mammals that can fly?

Which class of vertebrates are able to fly, have feathers, and lay eggs?

What do mammals have that allows them to produce milk for their young?

Which class of vertebrates has lateral lines that serve as sense organs?

Which class of vertebrates do shark, rays, and lampreys belong to?

If warm-blooded animals are called endothermic, what are cold-blooded animals called?

Which one isn't a characteristic of birds?

Arrange the five classes of vertebrates according to their order of appearance in the tree of life.

Which phylum is the oldest animal group?

Which phylum has transparent, gelatinous bodies and looks similar to jellyfish?

Which phylum includes unsegmented flatworms?

Which phylum has threadlike bodies and live as parasites?

What are the stinging cells of jellyfish called?

Which phylum has hard, spiny bodies and can regenerate their limbs?

Which group of Phylum Molluska includes squids, octopuses, cuttlefishes, and nautiluses?

What are some of the classes within Phylum Echinodermata? (4 points)

What is the main characteristic of invertebrates?

What is the meaning of the term 'Arthropoda'?

What is the main characteristic of Phylum Annelida?

Which subphylum of Arthropoda includes spiders, scorpions, and their relatives?

What is the main feature of Class Insecta?

Arthropod eyes, are divided into smaller eyes. What are these smaller eyes called?

Insects are under subphylum uniramia.

Trilobita, or trilobites are an extinct subphylum of arthropods.

Aside from insects, other arthropods also have wings.

Spiders are under subphylum chelicerata

Centipedes are under subphylum uniramia.

What defines an ecosystem?

Which biome supports the most species compared to others?

What layer of the rainforest receives the least sunlight?

What is the primary source of energy for plants in the rainforest?

Coral reefs are primarily formed by the secretion of which substance by coral polyps?

What component of coral reefs changes due to rainfall?

Which biome is characterized by brackish water, trees, and shrubs?

What kind of symbiotic relationship benefits both species?

What is the term for the interaction where one species benefits and the other is not bothered?

What is the primary role of mangrove swamps in protecting coastal areas?

Some plants have hollow thorns or stems where ants can live. The ants protect the plants from caterpillars.

Cleaner fish eat parasites off bigger fish which brings them relief.

While buffaloes pass through tall grass, the insects fly away. They are eaten by egret birds that always follow the buffaloes.

Barnacles attach themselves to whales that carry them to nutrient-rich waters. The whales gain no benefit.

Flowering plants depend on insects like bees and butterflies for pollination. In turn, they provide insects with nectar.

Orcas work together to kill dolphins.

When sea-snails die, they leave behind their shells which are picked up by hermit crabs to use as shelter.

Monstera plants have slits on their leaves which allow them to grow past other plants in the rainforest.

Lions stalk and ambush gazelles for food.

Orchids live on the branches of taller trees where they get access to more sunlight. The trees are not affected,