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Listen to Book 4: The Wild Expedition

All 150 answers from Book 4, read aloud. Press play and keep listening, or tap a question to jump to it. Each title links to its page with the video and the full answer.

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1.Why Are Leaves Green?
2.Why Do Trees Have Bark?
3.Why Do Flowers Smell Sweet?
4.Why Do Some Trees Lose Their Leaves?
5.Why Do Roots Grow Down?
6.Why Do Plants Need Sunlight?
7.Why Do Seeds Travel?
8.Why Is a Forest Quiet, Then Loud?
9.Why Do Mushrooms Pop Up After Rain?
10.Why Do Vines Climb?
11.Why Is Moss So Soft and Low?
12.Why Do Pine Trees Stay Green All Year?
13.Why Do Some Plants Have Thorns?
14.Why Do Leaves Turn Red and Gold?
15.Why Do Trees Have Rings Inside?
16.Why Do Plants Drink Through Roots?
17.Why Do Some Flowers Close at Night?
18.Why Do Weeds Grow in Sidewalk Cracks?
19.Why Do Forests Feel Cooler?
20.Why Do Acorns Become Oaks?
21.Why Do Some Plants Eat Bugs?
22.Why Do Cactuses Store Water?
23.Why Do Leaves Have Veins?
24.Why Do Trees Sway But Not Snap?
25.Why Do Forests Need Dead Logs?
26.Why Do Bees Make Honey?
27.Why Do Mosquitoes Bite?
28.Why Do Spiders Spin Webs?
29.Why Do Ants Walk in a Line?
30.Why Do Fireflies Glow?
31.Why Do Butterflies Start as Caterpillars?
32.Why Do Worms Come Out After Rain?
33.Why Do Ladybugs Have Spots?
34.Why Do Flies Rub Their Feet?
35.Why Do Crickets Chirp?
36.Why Do Snails Carry Shells?
37.Why Do Some Bugs Look Like Sticks?
38.Why Do Moths Fly to Lights?
39.Why Do Ticks Hitch a Ride?
40.Why Do Dragonflies Hover?
41.Why Can Ants Lift So Much?
42.Why Do Beetles Have Hard Shells?
43.Why Do Some Bugs Sting?
44.Why Do Earthworms Help Gardens?
45.Why Do Cicadas Buzz So Loud?
46.Why Do Spiders Have Eight Legs?
47.Why Do Flies Have Compound Eyes?
48.Why Do Bees Dance?
49.Why Do Slugs Leave a Shiny Trail?
50.Why Do Bugs Molt?
51.Why Do Birds Sing?
52.Why Do Squirrels Bury Nuts?
53.Why Do Baby Deer Have Spots?
54.Why Do Owls Fly So Quietly?
55.Why Do Woodpeckers Peck Trees?
56.Why Do Frogs Croak After Rain?
57.Why Do Snakes Shed Their Skin?
58.Why Do Bats Fly at Night?
59.Why Do Beavers Build Dams?
60.Why Do Ducks Have Webbed Feet?
61.Why Do Rabbits Freeze, Then Run?
62.Why Do Porcupines Have Quills?
63.Why Do Turtles Hide in Shells?
64.Why Do Geese Fly in a V?
65.Why Do Skunks Spray?
66.Why Do Hummingbirds Hover?
67.Why Do Wolves Howl?
68.Why Do Raccoons Have Clever Hands?
69.Why Do Deer Grow Antlers?
70.Why Do Some Animals Play Dead?
71.Why Do Birds Migrate?
72.Why Do Foxes Have Bushy Tails?
73.Why Do Tracks Look Different in Mud?
74.Why Do Some Animals Come Out Only at Night?
75.Why Can Tracks Tell a Story?
76.Why Is the Sky Blue?
77.Why Do Clouds Look Fluffy?
78.Why Does Rain Fall?
79.Why Does Thunder Follow Lightning?
80.Why Do Puddles Disappear?
81.Why Does the Wind Blow?
82.Why Do We See Rainbows?
83.Why Does Dew Appear in the Morning?
84.Why Do Lakes Freeze From the Top?
85.Why Do Rivers Flow Downhill?
86.Why Do Waves Keep Coming?
87.Why Is the Ocean Salty?
88.Why Does Fog Hug the Ground?
89.Why Do We Have Seasons?
90.Why Does Snow Sparkle?
91.Why Do Icicles Hang From Roofs?
92.Why Does the Moon Look Bigger Some Nights?
93.Why Do Stars Twinkle?
94.Why Is Sunset Orange and Red?
95.Why Do We Have Day and Night?
96.Why Do We See Our Breath in Winter?
97.Why Does a Compass Point North?
98.Why Does Frost Paint the Grass?
99.Why Do Storms Have Calm and Wild Parts?
100.Why Can a Weather Forecast Miss?
101.Why Do Ponds Get a Green Film in Summer?
102.Why Do Frogs Start as Tadpoles?
103.Why Do Ducks' Feathers Shed Water?
104.Why Do Some Fish Swim in Schools?
105.Why Do Water Striders Walk on Water?
106.Why Do Mosquitoes Hatch Near Water?
107.Why Does a Stream Make a Bubbling Sound?
108.Why Do Crayfish Hide Under Rocks?
109.Why Do Cattails Grow in Wet Ditches?
110.Why Do Turtles Bask on Logs?
111.Why Do Beavers Build Dams? Nature's Engineers
112.Why Do Snails Leave Shiny Trails?
113.Why Do Salamanders Like Damp Logs?
114.Why Do Wetlands Soak Up Floods?
115.Why Do Caddisfly Larvae Wear Stick Suits?
116.Why Do Frogs Croak After Rain? The Pond Chorus
117.Why Do Some Ponds Freeze While Springs Stay Open?
118.Why Do Ducks Dabble Upside Down?
119.Why Should You Not Drink Stream Water?
120.Why Is the Forest Louder at Night?
121.Why Do Fireflies Light Up?
122.Why Do Owls Fly So Quietly? Think Like the Mouse
123.Why Do Bats Zip Around at Dusk?
124.Why Do Some Flowers Smell Stronger at Night?
125.Why Do Raccoons Look So Busy After Dark?
126.Why Do Moths Fly at Lights?
127.Why Do We Hear Coyotes at Night?
128.Why Do Eyes Shine in a Flashlight?
129.Why Do Slugs Come Out After Dark?
130.Why Do Some Animals See Well at Night?
131.Why Do Night Insects Sound Like a Band?
132.Why Do Porcupines Wander After Dusk?
133.Why Do Night Hikers Use Red Light?
134.Why Do Crickets Chirp After Sunset?
135.Why Do Deer Freeze in Headlights?
136.Why Do Mushrooms Seem to Pop Up Overnight?
137.Why Do Trail Markers Matter in the Dark?
138.Why Should You Not Follow Glowing Eyes Off-Trail?
139.Why Does a Campfire Look Extra Bright at Night?
140.Why Do We Hear More When We Stop Walking?
141.Why Do Some Trees Creak at Night?
142.Why Do Night Hikers Stay Together?
143.Why Do a Map and a Grown-Up Beat Wandering?
144.How Do You Think Like a Nature Detective?
145.Why Do Dragonflies Dart Over Ponds?
146.Why Is Pond Water Brown Sometimes?
147.Why Do Tadpoles Lose Their Tails?
148.Why Do Herons Stand So Still?
149.Why Do Minnows Hide in Weeds?
150.Why Do Lily Pads Float?

The audio is the sound from each video, so it includes soft background music.

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